{"id":364,"date":"2026-05-08T03:13:09","date_gmt":"2026-05-08T03:13:09","guid":{"rendered":"https:\/\/automatictransmissionpart.com\/?post_type=product&p=364"},"modified":"2026-05-08T03:13:09","modified_gmt":"2026-05-08T03:13:09","slug":"ep-dual-oem-trailer-wheel-north-america","status":"publish","type":"product","link":"https:\/\/automatictransmissionpart.com\/ko\/product\/ep-dual-oem-trailer-wheel-north-america\/","title":{"rendered":"EP-\ub4c0\uc5bc\/OEM \ud2b8\ub808\uc77c\ub7ec \ud720 \u2014 \ubd81\ubbf8"},"content":{"rendered":"
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EP Series \u2014 North America Specification<\/p>\n

Dual \/ OEM Trailer Wheel \u2014 North America<\/h2>\n

16\u2033 Rim \u00b7 8-Bolt 165.1 mm PCD \u00b7 DUAL & OEM Configurations \u00b7 16\u00d76 and 16\u00d77 Sizes<\/p>\n<\/div>\n<\/div>\n<\/div>\n

1. Technical Specifications<\/h2>\n

Engineering parameters for the EP Dual \/ OEM Trailer Wheel \u2014 North America series. Confirm hub and axle fitment against these values before procurement.<\/p>\n

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\ub9e4\uac1c\ubcc0\uc218<\/th>\nValue \/ Specification<\/th>\nTechnical Notes<\/th>\n<\/tr>\n<\/thead>\n
Nominal Rim Diameter<\/td>\n16 inches (406.4 mm)<\/td>\nStandard North American trailer rim diameter<\/td>\n<\/tr>\n
\ub9bc \ub108\ube44<\/td>\n6 inches (16\u00d76) \/ 7 inches (16\u00d77)<\/td>\nTwo widths; ST and LT tire compatibility<\/td>\n<\/tr>\n
\ubcfc\ud2b8 \uc218\ub7c9<\/td>\n8 bolts<\/td>\nNorth American light\/medium trailer axle standard<\/td>\n<\/tr>\n
PCD \u2014 Pitch Circle Diameter<\/td>\n165.1 mm (6.5 inches)<\/td>\nTolerance \u00b10.2 mm hole-to-hole; Dexter \/ Lippert \/ AL-KO compatible<\/td>\n<\/tr>\n
\uc911\uc2ec \uad6c\uba4d \uc9c1\uacbd<\/td>\n121 mm \/ 124 mm \/ 124.6 mm<\/td>\nThree options; H7 bore tolerance; varies by part number<\/td>\n<\/tr>\n
Offset Range<\/td>\n6.35 mm \/ 12.7 mm \/ 139.7 mm<\/td>\nOEM variants: 6.35 & 12.7 mm; DUAL: 139.7 mm<\/td>\n<\/tr>\n
Hub Configurations<\/td>\nDUAL \/ OEM<\/td>\nDUAL for tandem dual-wheel axles; OEM for single-wheel hub mount<\/td>\n<\/tr>\n
Applicable Tire Sizes<\/td>\nST235\/80R16, LT235\/80R16, LT245\/75R16, LT265\/75R16<\/td>\nSpecial Trailer (ST) and Light Truck (LT) ratings<\/td>\n<\/tr>\n
Rated Load Capacity<\/td>\nUp to 3,500 lb (1,588 KG) per wheel<\/td>\nSupports 7,000 lb GVWR tandem trailer configuration<\/td>\n<\/tr>\n
Rim Material Grade<\/td>\nSPFH590 \/ DP600 high-strength steel<\/td>\nTensile strength \u2265 590 MPa; elongation \u2265 18%<\/td>\n<\/tr>\n
\ud45c\uba74 \ucc98\ub9ac<\/td>\nShot blast Sa 2.5 + epoxy primer + polyurethane topcoat<\/td>\nSalt spray resistance \u2265 480 h per ISO 9227<\/td>\n<\/tr>\n
Weld Method<\/td>\nRobotic MIG, full-penetration<\/td>\n100% post-weld air leakage test, zero-escape policy<\/td>\n<\/tr>\n
Dynamic Balance Residual<\/td>\n\u2264 75 g\u00b7cm<\/td>\n100% inline dynamic balance check on all units<\/td>\n<\/tr>\n
Radial Runout (TIR)<\/td>\n\u2264 1.0 mm<\/td>\nCMM dimensional verification; 100% inline check<\/td>\n<\/tr>\n
Radial Fatigue Life<\/td>\n\u2265 1,000,000 cycles at rated load<\/td>\nTested per SAE J267; applicable to trailer wheel service<\/td>\n<\/tr>\n
Quality Management System<\/td>\nISO 9001:2015<\/td>\nThird-party certified; SGS \/ T\u00dcV audit-compliant<\/td>\n<\/tr>\n
Lug Nut Specification<\/td>\n1\/2\u2033-20 UNF conical seat (60\u00b0) or mag seat<\/td>\nMatches North American light trailer hub hardware<\/td>\n<\/tr>\n
Recommended Lug Nut Torque<\/td>\n90 \u2013 120 ft\u00b7lb (122 \u2013 163 N\u00b7m)<\/td>\nStar-pattern; re-torque after first 50 miles of service<\/td>\n<\/tr>\n
Applicable Standards<\/td>\nSAE J267, SAE J328, TIA guidelines<\/td>\nNorth American trailer wheel qualification framework<\/td>\n<\/tr>\n
Air Leakage Test<\/td>\n100% inline pressure check<\/td>\nWeld seam and bead seat integrity; zero-escape policy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Model Reference \u2014 Dual \/ OEM Trailer Wheel For North America<\/h3>\n
\n\n\n\n\n\n\n\n\n
\ubd80\ud488 \ubc88\ud638<\/th>\n\ud06c\uae30<\/th>\nBolt Qty<\/th>\nPCD(mm)<\/th>\nCenter Hole Dia. (mm)<\/th>\n\uc624\ud504\uc14b(mm)<\/th>\nVent Hole<\/th>\n<\/tr>\n<\/thead>\n
JG21L23<\/td>\n16\u00d76<\/td>\n8<\/td>\n165.1<\/td>\n121<\/td>\n139.7<\/td>\nDUAL<\/td>\n<\/tr>\n
JG21L25<\/td>\n16\u00d76<\/td>\n8<\/td>\n165.1<\/td>\n124<\/td>\n139.7<\/td>\nDUAL<\/td>\n<\/tr>\n
JG21L36<\/td>\n16\u00d76<\/td>\n8<\/td>\n165.1<\/td>\n124.6<\/td>\n12.7<\/td>\nOEM<\/td>\n<\/tr>\n
JG44L09<\/td>\n16\u00d77<\/td>\n8<\/td>\n165.1<\/td>\n124<\/td>\n6.35<\/td>\nOEM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"automatictransmissionpart-products-EP-Dual<\/p>\n<\/div>\n

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2. Five Key Product Advantages<\/h2>\n
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01 \u2014 Exact 165.1 mm PCD for North American Trailer Axle Compatibility<\/h3>\n

The single most important dimensional parameter on any trailer wheel<\/strong> is the bolt circle \u2014 and 165.1 mm PCD is the dominant standard across the North American light and medium trailer market, used by Dexter Axle, Lippert Components, AL-KO, and the majority of trailer OEMs supplying the US and Canadian markets. This EP series maintains the 165.1 mm PCD with a pitch-to-pitch hole tolerance of \u00b10.2 mm, ensuring that the 8-bolt lug nut pattern achieves uniform clamping force across all positions when tightened to specification. Colombian trailer importers who have previously experienced fitment issues with locally-sourced replacement trailer wheels<\/strong> using nominally correct PCD values will find that the precision of this series eliminates the bore-to-stud misalignment that causes stud fatigue and uneven disc wear in real-world service. Verified batch-level PCD conformance is documented in the dimensional inspection report available with each production batch.<\/p>\n<\/div>\n

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02 \u2014 DUAL and OEM Vent Configurations in a Single Product Family<\/h3>\n

The distinction between DUAL and OEM vent hole configurations matters operationally, not just dimensionally. DUAL venting \u2014 used on JG21L23 and JG21L25 \u2014 is designed to provide brake ventilation in dual-wheel tandem axle configurations where two wheels share a hub and airflow to the brake drum is channeled through the combined vent geometry of both wheels. OEM venting \u2014 used on JG21L36 and JG44L09 \u2014 uses a pattern optimized for single-wheel mounting on hub-centered axle ends with minimal offset. Stocking both configurations from a single supplier relationship simplifies the procurement process for Colombian trailer parts distributors who serve mixed fleets of single-axle and tandem-axle trailers. It also eliminates the scenario where a workshop installs a DUAL-pattern trailer wheel<\/strong> on an OEM-specified hub position \u2014 a mismatch that can affect brake cooling geometry and reduce brake lining service life on the affected axle position.<\/p>\n<\/div>\n

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03 \u2014 16\u00d76 and 16\u00d77 Rim Widths \u2014 Covering the Full ST and LT Tire Range<\/h3>\n

The two rim widths in this series \u2014 16\u00d76 and 16\u00d77 inches \u2014 are not arbitrary choices. The 16\u00d76 rim is the correct fitment for Special Trailer (ST) tires in ST235\/80R16 and LT235\/80R16 sizing, which are the most common fitments on North American utility and boat trailers up to approximately 7,000 lb GVWR. The wider 16\u00d77 rim, available in the JG44L09 model, accommodates LT265\/75R16 and similar wider-profile tires used on heavier trailer applications including livestock trailers, equipment haulers, and agricultural utility trailers operating at or near the 10,000 lb GVWR threshold. Colombian trailer builders and importers who need dual OEM trailer wheel<\/strong> fitments across a range of trailer capacities can source both widths from this series \u2014 keeping supplier management straightforward and ensuring consistent quality across the entire inventory rather than managing two separate supplier relationships for different rim widths.<\/p>\n<\/div>\n

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04 \u2014 High-Strength Steel Construction for Load Ratings Up to 3,500 lb Per Wheel<\/h3>\n

These trailer wheels<\/strong> are fabricated from SPFH590 high-strength low-alloy steel, yielding a rim shell tensile strength of \u2265590 MPa with controlled elongation characteristics that absorb road shock without brittle deformation. This material specification supports load ratings up to 3,500 lb per wheel \u2014 the limit required for the popular 7,000 lb GVWR tandem-axle trailer configuration \u2014 and exceeds the structural requirements of most North American SAE J267 and ASTM A653 Grade 80 equivalent wheel specifications. For Colombian trailer importers and assemblers who face liability questions about component load ratings, the material traceability and test documentation available for this series provides the technical basis to confirm load-rated compliance without relying on manufacturer assertion alone. The high-strength construction also resists the rim flange deformation caused by kerb contact during parking and maneuvering, which extends the useful life of trailer wheels and tires<\/strong> assemblies operating in urban Colombian port and logistics environments.<\/p>\n<\/div>\n

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05 \u2014 480-Hour Salt Spray Rated Coating for Marine and Coastal Fleet Operation<\/h3>\n

Boat trailers and marine use represent a significant portion of the market for 16-inch 8-bolt trailer wheels<\/strong> \u2014 and no application environment is harder on wheel coatings than repeated salt water immersion during boat launching at coastal Colombian marinas. The epoxy primer plus polyurethane topcoat system on this series withstands \u2265480 hours of neutral salt spray testing per ISO 9227, providing the most durable corrosion protection available in a production steel trailer wheel<\/strong> without moving to galvanizing or powder coat systems. Colombian boat trailer operators in Cartagena, Santa Marta, and Buenaventura \u2014 where salt water exposure at the boat ramp combines with tropical humidity and UV exposure in transit \u2014 will find this coating system provides meaningfully longer protection than the standard-grade coatings found on commodity trailer wheels for sale<\/strong> in the local aftermarket. The protective finish is applied after mechanical shot blasting to Sa 2.5 surface cleanliness, ensuring maximum adhesion at the coating-to-metal interface rather than over inadequately prepared surfaces.<\/p>\n<\/div>\n<\/div>\n

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3. How It Works \u2014 Engineering Behind These Trailer Wheels<\/h2>\n

The production of a precision trailer wheel<\/strong> that will genuinely deliver its stated dimensional specification at the customer’s workshop begins with controlled material input. Each steel coil is verified against the order specification using X-ray fluorescence (XRF) elemental analysis and mechanical coupon testing before being released to the forming line. This material-level quality gate is what enables batch-level traceability \u2014 the ability to trace a specific wheel back to a specific steel coil, a specific heat number, and a specific set of mechanical test results. For Colombian importers who need to present customs documentation including material declarations, this traceability chain is a practical asset rather than a technical abstraction.<\/p>\n

The 16-inch rim shell is produced through a progressive roll-forming process: a measured length of high-strength steel strip passes through a series of contoured forming rolls that progressively shape the flat stock into the 16-inch rim profile \u2014 flanges, bead seats, drop center, and valve hole location. The critical bead seat dimensions \u2014 taper angle, bead seat width, and flange height \u2014 are controlled to the applicable Tire and Rim Association (TRA) and Tire Industry Association (TIA) standards for 16-inch light trailer rims. The bead seat taper of 5 degrees (the standard for tubeless light trailer applications) creates the interference seal between the tire bead and rim that retains air without an inner tube. Any deviation from this taper angle \u2014 even 0.5 degrees \u2014 creates a chronic air-loss path that presents as a slow leak rather than an immediate flat, making it one of the most practically damaging quality defects in a replacement trailer wheel<\/strong>.<\/p>\n

The disc pressing produces the bolt hole circle, center bore, and vent hole pattern in a single multi-stage progressive die operation that ensures the spatial relationship between these features is consistent across every unit. The 165.1 mm PCD is established by the tooling geometry rather than by individual drilling \u2014 which is why the hole-to-hole pitch tolerance is so tight. The center bore is then finish-machined (or finish-punched with a sizing die) to the specified diameter \u2014 121 mm, 124 mm, or 124.6 mm depending on the model \u2014 in an operation that controls bore-to-PCD concentricity, which is the geometric condition that determines whether the trailer wheel<\/strong> is truly centered on the hub flange or seated off-center by a fraction of a millimeter. Off-center seating introduces a once-per-revolution vibration frequency that appears as a low-frequency shimmy in the trailer at highway speeds \u2014 a workshop diagnostic that, if traced back to the wheel rather than the tire, often indicates a center bore that is out of tolerance.<\/p>\n

After assembly of rim to disc by robotic MIG welding under controlled parameters, the completed trailer wheel<\/strong> undergoes a 100% air pressure leak test at the weld seam and bead seat areas, followed by a 100% dynamic balance check with residual imbalance controlled to \u226475 g\u00b7cm. The tighter balance limit compared to heavy truck wheels reflects the fact that light trailer wheel vibration is transmitted directly to the tow vehicle and is perceived by the driver as ride quality \u2014 a subjective experience that affects customer satisfaction at a level that heavy truck operators may not prioritize equally. Only after passing both the leak test and the balance check does a wheel proceed to the coating line. Units that fail either check are quarantined and scrapped \u2014 not reworked for reissue.<\/p>\n<\/div>\n

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4. Material Composition<\/h2>\n

The structural performance of a trailer wheel<\/strong> over its service life is determined by three interlocking factors: the mechanical properties of the steel used, the geometry of the cross-section formed from that steel, and the quality of the weld joining disc to rim. This series is designed with discipline at each of these three levels. The rim shell and disc are produced from SPFH590 hot-rolled high-strength low-alloy steel \u2014 a grade that delivers a minimum yield strength of 440 MPa and an ultimate tensile strength in the range of 590\u2013730 MPa, with a minimum elongation at fracture of 18%. For a 16-inch light trailer wheel, these mechanical properties represent a significant safety margin over the structural demands of a 3,500 lb-rated wheel assembly. The high yield strength means the rim flange resists permanent deformation from pothole impacts and kerb strikes during parking, while the 18% elongation ensures the material deforms plastically rather than fracturing catastrophically if the yield point is exceeded in an extreme loading event.<\/p>\n

For the disc components where the bolt hole area generates the highest local stress concentrations during loading and cornering, DP600 dual-phase steel is used in specific configurations. The dual-phase microstructure \u2014 consisting of hard martensite particles distributed within a softer ferrite matrix \u2014 provides an elevated work-hardening rate during the forming operations that create the bolt hole and vent hole geometry, resulting in a disc that is progressively stronger in the vicinity of the highest-stress features. This work-hardening effect is particularly beneficial around the bolt holes, where the cyclic bending stress from trailer road loads creates a fatigue-critical environment over the service life of the trailer wheel<\/strong>. The DP600 disc material also contributes to a slight mass reduction compared to a conventional carbon steel disc of equivalent thickness, which is relevant for boat trailer applications where reducing unsprung mass improves tow vehicle handling and reduces fuel consumption on long highway journeys.<\/p>\n

The corrosion protection system is specifically calibrated for the challenging environments these trailer wheels<\/strong> operate in. Boat trailers in Colombian coastal departments experience repeated partial immersion in salt water during boat launching and retrieval, combined with sustained UV exposure during transit. Construction site utility trailers encounter caustic concrete residue and soil contamination. Agricultural trailers in the Llanos and Sabana regions face sustained humidity, chemical fertilizer splash, and road surface debris. The coating system addresses all of these environments: mechanical shot blasting to Sa 2.5 provides the surface profile that maximizes primer adhesion, epoxy primer at 40\u201360 \u00b5m DFT provides the chemical barrier layer, and a polyurethane topcoat at 60\u201380 \u00b5m provides the UV-resistant, abrasion-resistant surface layer. The complete system is validated to \u2265480 hours ISO 9227 neutral salt spray without corrosion breakthrough \u2014 a performance level verified by the National-Level Testing Center’s salt spray chamber facilities on production-representative sample wheels.<\/p>\n<\/div>\n

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5. \uc801\uc6a9 \uc2dc\ub098\ub9ac\uc624<\/h2>\n
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Boat Trailers and Marine Transport \u2014 Colombia’s Caribbean and Pacific Coasts<\/h3>\n

The JG21L25 and JG21L23 DUAL configuration trailer wheels<\/strong> are widely specified for boat trailer applications on North American-format running gear, and this application is directly relevant to Colombia’s expanding recreational boating sector on the Caribbean coast (Cartagena, Santa Marta, Barranquilla) and the Pacific coast (Buenaventura). North American-sourced boat trailers imported into Colombia through Cartagena or Barranquilla use Dexter or Lippert axles with 165.1 mm PCD hubs, and when the original trailer wheels for sale<\/strong> through the importer are unavailable locally, workshop operators need a dimensionally verified replacement. The 139.7 mm offset on the DUAL variants provides the correct track width for boat trailer geometry, preventing tire-to-fender contact during full steering lock \u2014 a fitment error that is both visually obvious and operationally dangerous. The 480-hour salt spray coating performance is a direct benefit for marine use, where the wheel is partially immersed in salt water at every boat launch.<\/p>\n<\/div>\n

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Utility and Equipment Trailers \u2014 Construction and Landscaping Logistics<\/h3>\n

The JG44L09 (16\u00d77, OEM, 6.35 mm offset) is the appropriate fitment for heavier utility and equipment trailers \u2014 skid-steer carriers, mini-excavator transport trailers, and landscape supply flatbeds \u2014 where the wider rim accommodates the LT265\/75R16 tire size needed for higher load capacity at lower inflation pressure. This segment of the Colombian trailer market has grown alongside the country’s construction infrastructure expansion in urban periphery zones around Bogot\u00e1, Medell\u00edn, Cali, and Barranquilla, where light construction equipment is regularly transported between sites on owner-operated or rental trailers. The 3,500 lb per wheel load rating supports tandem-axle trailer configurations at up to 14,000 lb GVWR \u2014 covering the majority of mini-excavator and skid-steer transport trailer applications in the Colombian construction sector. The OEM vent configuration and low offset minimize brake heat buildup during frequent braking cycles on urban construction access roads.<\/p>\n<\/div>\n

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Agricultural and Livestock Trailers \u2014 Coffee and Livestock Regions<\/h3>\n

North American-format single-axle and tandem-axle livestock and utility trailers have become increasingly common in Colombia’s highland farming regions \u2014 Antioquia, Boyac\u00e1, Nari\u00f1o \u2014 as imported US-market trailers enter the country through commercial channels. The 16-bolt 165.1 mm PCD specification is the standard on these trailers, and local availability of spare trailer wheels<\/strong> and replacement trailer wheels<\/strong> with this bolt circle has historically been inconsistent. Agricultural operators in these regions who run trailers for livestock transport, feed delivery, or farm equipment relocation cannot afford extended downtime waiting for special-order wheels to arrive at their nearest parts distributor. Stocking the JG21L36 OEM configuration (124.6 mm center bore, 12.7 mm offset) as a local workshop spare covers the majority of single-axle livestock trailer fitments encountered in the Colombian highland farming sector, providing a fast turnaround solution for a segment where operational continuity is directly tied to seasonal farming schedules.<\/p>\n<\/div>\n

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OEM Trailer Assembly \u2014 Colombian Trailer Manufacturing Operations<\/h3>\n

Several Colombian trailer manufacturing operations produce North American-format trailers for the domestic market and for re-export to neighboring countries under OEM or private-label arrangements. For these operations, the consistency and dimensional conformance of the dual OEM trailer wheel<\/strong> series is not merely a procurement convenience \u2014 it is a production quality parameter. A wheel that varies batch-to-batch in center bore by 0.5 mm creates random fitment variability in the trailer assembly line that appears as inconsistent track widths, asymmetric tire clearance, and variable lug nut torque behavior across the production run. This series eliminates that variability through controlled production processes and 100% dimensional inspection, providing trailer OEM assemblers with a wheel that fits identically on unit 1 and unit 500 of a production run \u2014 essential for maintaining assembly quality standards and for honoring the dimensional specifications on which trailer export certifications are based.<\/p>\n<\/div>\n<\/div>\n

\"automatictransmissionpart-products-EP-Dual<\/p>\n

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6. Regulatory Compliance & Industry Standards<\/h2>\n

Colombia \u2014 Ministerio de Transporte<\/h3>\n

In Colombia, vehicle and trailer component standards are governed by the Ministerio de Transporte through Resoluci\u00f3n 4100 de 2004 and its amendments, which define axle load limits and dimensional requirements for trailers operating on Colombia’s national road network. Commercial importers of trailer components into Colombia are required to present technical documentation \u2014 including material test certificates, dimensional specifications, and load ratings \u2014 at customs. The product series described on this page is produced under ISO 9001:2015 quality management and is supported by batch-level dimensional inspection records and material test certificates. Colombian customs declarations for these trailer wheels<\/strong> can be supported by Certificate of Origin, commercial invoice, and technical datasheets available in English (Spanish translation on request). For Colombian trailer OEM assemblers who need to document the wheel component specification in their trailer technical files for RUNT (Registro \u00danico Nacional de Tr\u00e1nsito) registration purposes, the product datasheet and load rating documentation from this series provides the required technical basis.<\/p>\n

United States \u2014 FMCSA and DOT Requirements<\/h3>\n

In the United States, trailer wheels for use on trailers above 10,000 lb GVWR operating in interstate commerce are subject to Federal Motor Carrier Safety Administration (FMCSA) requirements under 49 CFR Part 393, which mandates that wheels be free from cracks, elongated bolt holes, and missing fasteners, and that maintenance records be kept. For lighter trailers under 10,000 lb GVWR \u2014 the primary application range for this 16-inch series \u2014 trailer wheel standards are governed primarily by SAE J267 (wheel performance requirements and testing), SAE J328 (performance requirements for passenger car wheels, also referenced for light trailer applications), and the Tire and Rim Association (TRA) dimensional standards. This product series is tested to SAE J267 radial fatigue protocol, and the applicable test reports are available on request to support DOT compliance documentation for trailers imported into the United States from Colombia or operating under US Motor Carrier authority.<\/p>\n

Canada \u2014 Transport Canada<\/h3>\n

Transport Canada’s Motor Vehicle Safety Act (MVSA) and applicable Motor Vehicle Safety Regulations (MVSR) govern trailer component standards in Canada. Trailer wheels for light trailers operating on Canadian roads must comply with dimensional and performance standards equivalent to SAE J267, and trailers imported into Canada require documentation confirming component compliance. The 165.1 mm PCD 8-bolt trailer wheels<\/strong> in this series are compatible with Dexter and Lippert axles specified on trailers sold into both US and Canadian markets, making this series relevant for Colombian trailer manufacturers who export to North American buyers operating across both countries.<\/p>\n

European Union \u2014 Reference Standards<\/h3>\n

While this product series is specifically dimensioned for North American trailer axle specifications, the broader manufacturing quality framework \u2014 ISO 9001:2015 certification, ECE R-124 fatigue test equivalence, and ETRTO dimensional standard familiarity \u2014 means that Colombian importers who also source European-specification trailer components can work with the same manufacturing source under a unified quality assurance framework. This is relevant for Colombian importers serving the growing segment of European-format trailers entering Colombia through trade with European logistics operators and trailer manufacturers expanding into South American markets.<\/p>\n<\/div>\n

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7. \ud68c\uc0ac \uc18c\uac1c<\/h2>\n

Our wheel product portfolio spans passenger vehicle wheels, commercial truck wheels, trailer wheels, and agricultural vehicle wheels \u2014 exported to markets across Europe, North America, and Southeast Asia. The OEM supply relationships we maintain with automotive manufacturers including Volkswagen, General Motors, Ford, Volvo, and CIMC impose rigorous quality audit standards that are applied consistently across our entire production range, including the North American Dual \/ OEM Trailer Wheels series described on this page.<\/p>\n

Seven dedicated production bases, one tire and wheel assembly facility, and a high-end manufacturing complex covering approximately 400,000 square feet make up our manufacturing infrastructure. Production equipment was sourced from Germany, Sweden, Spain, Japan, and the United States \u2014 the global centers of wheel-making technology \u2014 and all pressing, welding, and handling operations are performed by industrial robots operating under programmed parameters that eliminate human variability from the production process. In-line inspection machines perform 100% checking at every critical station: dimensional inspection, dynamic balance, and air leakage testing are applied to every unit, not to statistical samples. This 100% inspection policy is what allows us to state with confidence that the load ratings and dimensional specifications of these trailer wheels for sale to international buyers reflect the actual production population, not the best-case results from a curated sample set.<\/p>\n

Our National-Level Testing Center \u2014 equipped with German RMS cornering fatigue rigs, US ITS radial fatigue machines, CMM coordinate measuring systems, salt spray chambers, UV aging ovens, and X-ray fluorescence spectrometers \u2014 performs the full qualification test matrix on production-representative samples from each wheel series. The design load ratings, fatigue life estimates, and corrosion performance figures stated in this product documentation are derived from this testing, not from theoretical calculations.<\/p>\n

\uc791\uc5c5\uc7a5<\/h3>\n
\"Trailer\"Wheel\"Quality\"Robotic<\/div>\n<\/div>\n
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8. Related Products \u2014 Complete Trailer Axle-End Supply<\/h2>\n

\uc5d0\uc774 trailer wheel<\/strong> performs within a system of hub, axle, and fastener components. Sourcing compatible running gear from a coordinated supply base eliminates dimensional mismatches and streamlines the quality audit process for Colombian trailer OEM assemblers and wholesale parts distributors.<\/p>\n

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Wheel Hub Units<\/h3>\n

The hub unit is the physical interface between the trailer wheel<\/strong> and the axle. The center bore diameter of the wheel \u2014 121 mm, 124 mm, or 124.6 mm depending on the part number \u2014 must match the hub pilot diameter precisely. A hub that is 0.5 mm undersize will not accept the wheel at all; a hub that is 0.5 mm oversize allows the wheel to seat off-center, creating runout and vibration from the first kilometer of operation. We supply wheel hub units engineered to coordinate with the center bore specifications of this Dual \/ OEM Trailer Wheel<\/strong> series, providing a single-source solution for the hub-to-wheel interface that eliminates the fitment uncertainty inherent in mixing components from uncoordinated suppliers. For Colombian trailer assemblers who specify North American 165.1 mm PCD axle configurations, sourcing wheel and hub unit from the same manufacturer provides a documented dimensional compatibility chain that supports trailer homologation and RUNT registration documentation requirements.<\/p>\n

\"Wheel<\/div>\n<\/div>\n
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\ud2b8\ub808\uc77c\ub7ec \uc561\uc2ac \ube54 \/ \ud2b8\ub808\uc77c\ub7ec \uc2a4\ud540\ub4e4<\/h3>\n

The trailer axle beam and spindle assembly is the structural foundation that carries the hub and wheel. For Colombian trailer manufacturers who are building North American-format trailers using the 165.1 mm PCD 8-bolt wheel standard, sourcing the axle beam from the same manufacturer as the trailer wheels<\/strong> ensures that the critical interface dimensions \u2014 hub pilot diameter, stud thread pitch, and spindle bearing journal \u2014 are coordinated by design rather than by chance. Our trailer axle and spindle products cover the dimensional range compatible with this Dual \/ OEM Trailer Wheels<\/strong> series, supporting complete running gear supply from a single source. For Colombian trailer OEM operations that currently source axle and wheel from separate vendors, consolidating to a coordinated single-source supply eliminates the fitment verification overhead that consumes significant workshop time and occasionally results in assembly line delays when dimensional discrepancies are discovered at the fitment stage rather than at the incoming inspection stage.<\/p>\n

\"Trailer<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\uc790\uc8fc \ubb3b\ub294 \uc9c8\ubb38<\/h2>\n
\nQ1. What is the difference between the DUAL and OEM vent hole configurations on these North American trailer wheels, and how do I know which one fits my trailer axle?<\/summary>\n
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The DUAL vent configuration (JG21L23 and JG21L25) is designed for dual-wheel tandem trailer axle assemblies, where two trailer wheels<\/strong> are mounted outboard on a shared hub. The vent hole pattern and offset (139.7 mm) position the wheel rim at the correct track width for this dual-mount geometry. The OEM vent configuration (JG21L36 and JG44L09) is designed for single-wheel hub-centered mounting with a low offset (12.7 mm or 6.35 mm), where the wheel sits close to the hub flange face and the vent holes are positioned to direct brake airflow in a single-wheel mounting arrangement. To determine which applies to your trailer, check whether the axle is designed for single or dual wheel mounting at each axle end, and measure the offset from the hub face to the wheel centerline on the existing wheel. If you cannot confirm from the vehicle’s documentation, contact us with your axle make, model, and hub specifications and we will confirm the correct part number.<\/p>\n<\/div>\n<\/details>\n

\nQ2. How do I verify that a replacement trailer wheel center bore will fit correctly on a Dexter or Lippert trailer axle hub before ordering for a Colombian boat trailer fleet?<\/summary>\n
\n

Measure the hub pilot diameter on your trailer axle using a digital inside micrometer or bore gauge. Dexter and Lippert North American trailer axles use hub pilot diameters of 121 mm or 124 mm depending on the axle capacity and generation. The JG21L23 uses a 121 mm center bore and the JG21L25, JG21L36, and JG44L09 all use 124 mm bore (JG21L36 is 124.6 mm to the nearest 0.1 mm \u2014 effectively the same hub). If you are not able to measure directly, identify the axle part number from the axle tag or trailer documentation, and the Dexter or Lippert axle specification sheet will confirm the hub pilot diameter. Alternatively, provide us with the axle specification and we will confirm the correct trailer wheel<\/strong> center bore variant for your fleet.<\/p>\n<\/div>\n<\/details>\n

\nQ3. What is the correct lug nut torque specification for these 8-bolt trailer wheels when fitted to a Dexter or Lippert North American trailer axle in a Colombian fleet workshop?<\/summary>\n
\n

For standard 1\/2\u2033-20 UNF lug nut hardware on these 8-bolt trailer wheels<\/strong>, the correct torque range is 90\u2013120 ft\u00b7lb (122\u2013163 N\u00b7m), applied progressively in a star pattern across all eight positions. Always perform an initial re-torque after the first 50 miles (80 km) of loaded service, as new wheel and hub mating surfaces micro-settle during the first operating cycle and clamp load decreases slightly from the initial torque value. Subsequently, include torque verification at every tire change service. Under-torque is a leading cause of stud fatigue failure on light trailer axles, because studs that are not fully clamped carry dynamic bending loads they were not designed to absorb. Over-torque can stretch and permanently damage the stud threads. Use a calibrated torque wrench \u2014 not an uncalibrated impact gun \u2014 for final torquing of trailer wheels<\/strong> on any North American axle specification.<\/p>\n<\/div>\n<\/details>\n

\nQ4. What quality certifications do these trailer wheels carry, and how does a Colombian importer verify conformance during the customs clearance process?<\/summary>\n
\n

The production facility holds ISO 9001:2015 quality management system certification, verified by third-party auditors. Products in this series are tested to SAE J267 radial fatigue protocol, with test reports available from accredited third-party laboratories (SGS, T\u00dcV, BV) on request per order. Material test certificates (MTCs) referencing SPFH590 or equivalent ASTM\/GB\/T steel grade standards accompany each production batch on request. For Colombian customs clearance, the standard documentation package is: commercial invoice, packing list, Certificate of Origin, and product technical datasheet. If the Colombian customs declaration requires a specific statement of conformance to a technical standard, the SAE J267 test report provides the appropriate technical reference. Spanish-language versions of the technical datasheet are available on request for RUNT trailer registration documentation purposes.<\/p>\n<\/div>\n<\/details>\n

\nQ5. Which dual OEM trailer wheel configuration is best suited for a tandem-axle utility trailer used in Colombian construction logistics around Bogot\u00e1 and Medell\u00edn?<\/summary>\n
\n

For a tandem-axle utility trailer operating at 14,000 lb GVWR or below in Colombian urban construction logistics, the JG44L09 (16\u00d77, OEM, 6.35 mm offset, 124 mm center bore) is the most appropriate selection if the trailer uses LT265\/75R16 tires on North American axle hubs with 124 mm hub pilot diameter. The 16\u00d77 rim provides the tire-contact width needed for the higher-capacity 265-section tire, and the low 6.35 mm offset minimizes the cantilever bending moment on the axle spindle under full rated load \u2014 an important structural consideration for tandem-axle trailers that are frequently loaded to near-maximum capacity in construction logistics applications. If the trailer uses LT235\/80R16 or ST235\/80R16 tires, the JG21L36 (16\u00d76, OEM, 12.7 mm offset) is the correct narrower-rim selection. Confirm the hub pilot diameter from your axle documentation before ordering.<\/p>\n<\/div>\n<\/details>\n

\nQ6. How does regular wheel balance inspection on a trailer affect towing safety and tire wear when hauling freight on Colombia’s national highways?<\/summary>\n
\n

An unbalanced trailer wheel<\/strong> generates a rotating centrifugal force at once-per-revolution frequency. At 80\u201390 km\/h on Colombia’s national highway network, this translates to a vibration frequency of approximately 13\u201315 Hz \u2014 within the range that the tow vehicle’s suspension amplifies rather than isolates. The practical effect is experienced as steering wheel shimmy, tow vehicle body shake, and accelerated rear tire wear on the tow vehicle. For the trailer wheels and tires<\/strong> themselves, the oscillating centrifugal load accelerates radial tire wear at the heavier side of the imbalanced wheel, creating a cupping pattern that reduces tire service life by 20\u201340% and reduces traction performance. The \u226475 g\u00b7cm balance limit on this series controls the initial balance condition; however, balance should be re-verified at each tire change, as corrosion deposits, mud accumulation in the vent holes, or minor rim deformation from road incidents can shift the balance condition over time.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n

\ud3b8\uc9d1\uc790: PXY<\/p>","protected":false},"excerpt":{"rendered":"

The North American trailer market runs on a tightly standardized set of axle and wheel specifications, and the 8-bolt 165.1 mm PCD bolt circle in a 16-inch rim diameter is arguably the single most prevalent configuration across utility trailers, boat trailers, livestock haulers, and light cargo trailers from Canada through the United States and into the Latin American markets that have adopted North American trailer standards. The EP Dual \/ OEM Trailer Wheels series is manufactured precisely to that standard \u2014 covering two hub configurations (DUAL and OEM), two rim widths (16\u00d76 and 16\u00d77), and four distinct center bore and offset variants that match the hub geometry of the most widely sold North American trailer axles. <\/p>\n

There are two configurations in this series that serve fundamentally different assembly contexts. The DUAL configuration \u2014 covering part numbers JG21L23 and JG21L25 \u2014 uses a DUAL vent hole pattern designed to accommodate the dual-wheel mounting geometry used on tandem axle trailers where two wheels are mounted outboard on a shared hub. The center bore and offset values for the DUAL variants (121 mm and 124 mm respectively, both at 139.7 mm offset) place the tire’s rolling centerline at the correct track width for tandem-axle trailer geometry as specified in SAE J1095 and the Trailer Industry Association (TIA) dimensional guidelines. The OEM configuration \u2014 covering JG21L36 and JG44L09 \u2014 is dimensioned for single-wheel hub-centered mounting with tighter offset tolerances (12.7 mm and 6.35 mm) used on trailer axles where the wheel offset is minimized to reduce axle bending moment. <\/p>\n

The 16-inch rim diameter in both the 6-inch and 7-inch width variants accommodates the tire sizes most commonly found on North American light trailer applications: LT235\/80R16, LT245\/75R16, ST235\/80R16 (Special Trailer), and LT265\/75R16 .<\/p>","protected":false},"featured_media":367,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[30],"product_tag":[],"class_list":{"0":"post-364","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-trailer-wheel","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/product\/364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/media\/367"}],"wp:attachment":[{"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/media?parent=364"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/product_brand?post=364"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/product_cat?post=364"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/automatictransmissionpart.com\/ko\/wp-json\/wp\/v2\/product_tag?post=364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}