Descrizione
Ruote per rimorchio EP-10″ a doppio passo standard
Dual PCD 114.3/108mm — Precision-Engineered for European and South American Trailer Compatibility
1. Technical Specifications of Pitch Circle Trailer Wheels
| Parametro | JG34JA01 Pitch Circle Trailer Wheels | JG34JA02 Pitch Circle Trailer Wheels |
|---|---|---|
| Codice articolo | JG34JA01 | JG34JA02 |
| Size (Rim Width x Diameter) | 10X4 | 10X4 |
| Quantità di bulloni | 5 | 5 |
| PCD (mm) — Double Standard | 114.3 / 108 | 114.3 / 108 |
| Center Hole Diameter (mm) | 63 | 63 |
| Offset (mm) | 0 | 0 |
| Fori di ventilazione | 8 | 6 |
| Wheel Construction | Rolled steel disc + rim | Rolled steel disc + rim |
| Bolt Hole Diameter (mm) | 12.5 (nominal) | 12.5 (nominal) |
| Rim Type | Drop center | Drop center |
| Applicable Tire Size | 3.50-10 / 4.00-10 | 3.50-10 / 4.00-10 |
| Trattamento superficiale | Powder coat / Paint | Powder coat / Paint |
| Finish Options | Silver, Black | Silver, Black |
| Corrosion Resistance Test | 500+ hours salt spray (ISO 9227) | 500+ hours salt spray (ISO 9227) |
| Dynamic Balance Tolerance | Within 10 grams | Within 10 grams |
| Radial Runout Tolerance (mm) | 1.0 max | 1.0 max |
| Lateral Runout Tolerance (mm) | 0.8 max | 0.8 max |
| Quality Standard | ISO/TS 16949, JWL | ISO/TS 16949, JWL |
| Mounting Recommendation | Hub-centric with 63mm bore | Hub-centric with 63mm bore |
| Packaging | Individual carton, export pallet | Individual carton, export pallet |
2. Five Key Product Advantages of Pitch Circle Trailer Wheels
Dual PCD 114.3/108mm for Universal Trailer Fitment
The defining advantage of these 10-inch double standard pitch circle trailer wheels is their simultaneous compatibility with both the 114.3mm and 108mm bolt circle standards. A single wheel unit replaces two separate part numbers in trailer fleet inventories, directly reducing stock holding costs and simplifying spare wheel logistics. In Colombia and across South America, trailer axle configurations from European and domestically assembled sources frequently coexist in the same fleet, and the dual PCD design makes replacement pitch circle trailer wheels straightforward regardless of which hub standard the specific trailer axle uses. This compatibility advantage is especially valuable for smaller trailer operators and agricultural equipment users where procurement simplicity outweighs any premium associated with specialized dual-standard engineering.
Zero Offset for Correct Axle Geometry
The zero offset specification on these trailer wheels positions the wheel disc mounting face flush with the centerline of the rim, ensuring that the tire contact patch falls exactly where the axle designer intended. For trailer applications, deviating from the intended offset causes uneven bearing load distribution and accelerated wear at the inner or outer bearing races, potentially leading to premature bearing failure on trailers that operate at or near their rated load capacity. Zero offset pitch circle trailer wheels maintain the spindle load geometry that the axle manufacturer’s engineering calculations assumed, preserving the service life of bearings, spindles, and brake components across the full lifecycle of the trailer assembly in demanding Colombian road conditions.
Dual Vent Hole Options for Brake Cooling Flexibility
The two-variant structure of this pitch circle trailer wheels series, offering 8 vent holes (JG34JA01) and 6 vent holes (JG34JA02), allows procurement managers and fleet workshops to specify their preferred level of brake ventilation within a single product family. More vent holes increase the volume of air circulating through the wheel barrel during rotation, providing faster cooling of drum brake components on trailers that encounter sustained downhill braking on Colombian mountain roads or in dense urban stop-and-go traffic. The flexibility to select between these two configurations without changing any other specification simplifies stocking while addressing genuine technical differences in operating environments across Colombia’s diverse geography from coastal lowlands to high Andean freight routes.
Compact 10X4 Size for Light and Utility Trailer Applications
The 10X4-inch rim dimensions make these trailer wheels particularly suited to light utility trailers, agricultural transport equipment, compact cargo trailers, and similar small-format trailer applications where the wheel size is constrained by the trailer structure and cargo height requirements. In Colombian agricultural regions and urban delivery networks, small trailer wheels in this size range are a high-turnover replacement item, and having a heavy-duty trailer wheel solution in this compact size that covers dual PCD standards provides distributors with a product that addresses a broad segment of the small trailer wheel for sale market without maintaining multiple SKUs for near-identical applications.
Precision-Drilled 5-Bolt Pattern with 63mm Center Bore
Achieving accurate dual-PCD drilling requires significantly tighter manufacturing tolerances than single-PCD wheel production. Each bolt hole must be positioned to satisfy both the 114.3mm and 108mm circle simultaneously, meaning positional errors that would be acceptable in a standard single-PCD wheel become inadmissible in a double standard design. The 63mm center bore is machined to close tolerances for reliable hub centering, and the 5-bolt pattern provides the clamping force distribution needed for trailer load ratings in this size class. This level of precision drilling capability reflects quality control investment that directly determines whether the forged trailer wheels or machined pitch circle trailer wheels perform reliably across their intended service life.
3. Working Principle of Pitch Circle Trailer Wheels
The fundamental engineering challenge that these 10-inch double standard pitch circle trailer wheels address is the creation of a single bolt pattern that simultaneously satisfies two different pitch circle diameters. In conventional single-PCD wheel design, each of the five bolt holes is positioned on a circle of one specific diameter, and the wheel can only mount on hub flanges that match that exact circle. In the dual-PCD 114.3/108mm design, the bolt hole positions are calculated to fall on both circles at once by using the geometric relationship between the two circle diameters and the five-bolt count. This is achievable because the angular positions of the bolt holes can be arranged such that each physical hole serves as a valid position for both the 114.3mm PCD and the 108mm PCD simultaneously. The result is that a trailer hub with studs arranged on a 114.3mm bolt circle passes cleanly through the wheel’s holes, and equally, a hub with studs on the 108mm circle also aligns correctly — without any slotting, elongation, or compromise in the contact geometry between nut seat and wheel surface. Maintaining proper bolt hole geometry is critical: any deviation from the calculated dual-PCD positions would result in angular misalignment between the stud and hole in at least one PCD configuration, causing uneven load transfer and accelerated fatigue at the bolt contact areas.
When the pitch circle trailer wheels are mounted and the wheel nuts are torqued to specification, the clamping force draws the disc hub face into contact with the trailer axle’s flange face, and the 63mm center bore registers concentrically over the hub pilot diameter. Zero offset means that as the trailer wheel rotates under load, the bending moment transmitted from the tire contact patch to the bearing assembly passes through the wheel disc at its geometric center, avoiding the asymmetric loading that occurs with positive or negative offset designs. The vent holes in the disc serve a secondary but important function: as the wheel rotates, the holes create airflow through the wheel barrel that carries heat away from drum brake components during and after braking events. The difference between 8-hole and 6-hole variants in this product line translates to a meaningful difference in the volume of air that passes through the disc per revolution at any given road speed, giving fleet operators in warmer Colombian regions or on mountain descent routes the option to select the variant that better suits their thermal management needs without changing any other aspect of the trailer wheel specification.
4. Material Composition of Pitch Circle Trailer Wheels
The EP-10″ Double Standard Pitch Circle Trailer Wheels are fabricated from cold-rolled high-strength steel sheet, selected for its combination of tensile strength, formability, and weldability. The disc component, which carries the bolt holes and center bore, is stamped from steel with a minimum yield strength of 340 MPa, providing the load-bearing capacity needed at the five bolt positions where concentrated clamping forces and dynamic loads interact with the hole edge geometry. The dual-PCD bolt hole pattern demands that the material surrounding each hole maintains its structural integrity without cracking or deforming during extended service, which is why the steel grade selection emphasizes both strength and ductility — material that is too brittle would crack at the hole edges under cyclic loading, while material that is too soft would allow the hole to deform under repeated tightening cycles. The rim section, which provides the bead seat for the tire and the structural shell of the wheel barrel, is roll-formed from compatible steel strip and welded to the disc using a controlled resistance welding process that fuses the two sections without introducing excessive heat-affected zone weakening around the joint.
Surface protection begins immediately after the welding and machining operations are complete, as bare steel in the Colombian coastal and tropical inland climate begins to oxidize rapidly without protection. The wheels undergo a multi-stage preparation process including mechanical deburring of all cut edges, chemical degreasing to remove forming lubricants, phosphate conversion coating to create a reactive layer that promotes paint adhesion, and then application of the final powder coat or liquid paint finish. The black pitch circle trailer wheels variant uses carbon-black pigmented coating formulations that provide equivalent corrosion protection to the silver variant while offering a different aesthetic. Both finishes are tested to a minimum of 500 hours salt spray exposure per ISO 9227 without blistering or underfilm corrosion, a standard that reflects the real-world conditions encountered by trailer wheels operating in coastal Colombian regions near Barranquilla, Cartagena, and the Pacific coast ports where salt-laden humid air is a constant presence. The machined surfaces at the center bore and hub face contact area are left unpainted to ensure bare metal-to-metal contact for accurate centering and reliable clamping load retention.
5. Pitch Circle Trailer Wheels’ Application Scenarios
Agricultural and Farm Trailers
Colombia’s agricultural sector relies extensively on light trailers for moving harvested crops, supplies, and equipment between fields and processing facilities. The 10X4 size pitch circle trailer wheels are a standard replacement item for the small single-axle trailers common in coffee, sugarcane, and banana plantation operations across the Eje Cafetero, Valle del Cauca, and coastal banana regions. The dual-PCD configuration eliminates fitment problems when replacing wheels on trailers sourced from different equipment suppliers over the years.
Urban Cargo and Market Trailers
Small tow-behind cargo trailers used for market delivery and urban goods distribution throughout Bogota, Medellin, and Cali frequently reach the end of their tire and wheel service life before the trailer frame needs replacement. The trailer wheel for sale demand in urban distribution is driven by high mileage accumulation on mixed-surface urban roads, making replacement pitch circle trailer wheels in standard sizes a steady market segment for Colombian automotive parts distributors and trailer repair workshops.
Boat and Marine Trailers
Coastal Colombia, particularly around the Caribbean coast from Barranquilla to the Gulf of Uraba and along the Pacific coast near Buenaventura and Tumaco, has a substantial recreational and commercial fishing boat culture that depends on trailer wheels for launching and retrieving vessels from boat ramps. Marine trailer environments are among the most demanding for trailer wheel corrosion resistance due to constant salt water and humidity exposure, making the quality of the surface coating on these pitch circle trailer wheels a primary selection criterion for coastal distributors.
Utility and Equipment Trailers
Landscaping, construction, and general utility trailers used by small contractors and service businesses throughout Colombia operate in varied terrain and load conditions that accelerate wheel wear. The heavy-duty trailer wheel construction of the JG34JA01 and JG34JA02 models provides the structural margin needed to handle overloaded operating conditions that are common in developing market environments, where rated capacity limits are not always strictly observed and replacement spare trailer wheel mount options are not always readily available on site.
European-Origin Trailer Replacement Parts Market
European trailer manufacturers historically used both 108mm and 114.3mm PCD standards in their small trailer axle designs, and Colombia has a significant installed base of imported European-specification trailers in agricultural machinery and industrial sectors. The double standard pitch circle trailer wheels nearby demand from users of this equipment is served well by a dual-PCD product that eliminates the sourcing difficulty of finding the correct single-PCD wheel from a European parts supply chain with long lead times and high freight costs compared to regionally distributed alternatives.
Polished and Custom Trailer Applications
The trailer tires pitch circle wheels market also encompasses decorative and custom trailer builds where wheel appearance is a purchasing factor alongside technical specifications. Polished trailer wheels and aluminum trailer wheels compete in this segment, but the steel-based pitch circle trailer wheels 17 inch equivalent load ratings combined with a well-finished powder coat surface offer a practical and cost-effective option for customers who want a presentable trailer wheel without the weight and cost premium of aluminum alternatives.
6. Regulatory Compliance and Standards
Trailer wheel products entering the Colombian market are subject to the vehicle safety and roadworthiness regulations administered by the Ministry of Transport (Ministerio de Transporte) under Decreto 1079 and associated resolutions governing vehicle technical inspection requirements. Trailer wheels must meet the structural and dimensional standards applicable to their rated load class, and documentation of manufacturing quality system certification is increasingly requested by Colombian fleet operators and fleet procurement departments as part of their supplier qualification processes. Our production quality management system is certified under ISO/TS 16949, and structural testing of these pitch circle trailer wheels follows JWL test methodology including radial fatigue testing and impact testing at 13 degrees to simulate pothole contact. These standards, while originating in the Japanese and European automotive industries, are recognized internationally and provide a technically credible basis for demonstrating structural adequacy that extends beyond mere country-of-origin documentation.
In the European Union, where the dual PCD 114.3/108mm standard combination originated and where significant trailer equipment exports to South America originate, wheel products for trailers used on public roads fall under the scope of Directive 2007/46/EC framework and associated technical standards including ISO 1750 (wheel and rim vocabulary), ISO 4209 (rims for agricultural tires), and the ECE-R124 regulation for passenger car wheels, with commercial trailer wheel standards referenced in related UNECE frameworks. South Africa’s National Road Traffic Act also references wheel structural standards applicable to trailers, relevant for operators importing South African-assembled trailer equipment into Colombia. For fleet operators across South America who require documented confirmation of compliance before purchasing trailer tire and wheel packages, our technical team can provide test report summaries and quality certification documents to support procurement approval processes in Colombia, Peru, Ecuador, and other regional markets where trailer wheel supplier qualification documentation is a procurement requirement.
7. Chi siamo
We are an established manufacturer specializing in steel wheel production for passenger vehicles, commercial trucks, trailers, and agricultural equipment. Our production facility operates multiple dedicated wheel lines with annual output capacity supporting both domestic market supply and export to distributors across South America, Africa, Southeast Asia, and European markets. Engineering investment in advanced roll-forming technology, automated welding systems, and inline dimensional inspection ensures that every trailer wheel leaving our facility meets the tight tolerances that dual-PCD products like the JG34JA01 and JG34JA02 demand. Our quality management system operates under ISO/TS 16949 certification, and our test center conducts complete wheel performance validation including radial fatigue, cornering fatigue, impact resistance, and gas leak testing.
Workshop
8. Related Products
We manufacture the complete wheel end assembly ecosystem that these pitch circle trailer wheels belong to, offering a one-stop supply advantage that ensures dimensional compatibility between wheel, hub, and axle components. Our full range of trailer system components is designed to work together for maximum service life and minimum assembly complexity.
Mozzi delle ruote
Precision-machined wheel hubs engineered to match the 63mm center bore and 5-bolt PCD specifications of these pitch circle trailer wheels. Our wheel hubs are manufactured to close tolerances at the bearing seat and pilot diameter, ensuring accurate wheel centering and predictable bearing preload when paired with the JG34JA01 or JG34JA02 trailer wheels in a complete axle assembly. System compatibility between hub and wheel eliminates the fitment uncertainties that arise when sourcing these components from different suppliers.
Trave dell'asse del rimorchio / Perno del rimorchio
Complete trailer axle beams and individual trailer spindles designed for light and medium trailer applications in the same load class as the JG34JA01 and JG34JA02 trailer wheels. These axle components are machined to the bearing seat dimensions and flange face geometry that ensures correct wheel mounting with the 63mm center bore and zero offset specification of the pitch circle trailer wheels. Sourcing axle and wheel from a single supplier eliminates dimensional incompatibility between components and simplifies warranty responsibility for the complete wheel end assembly.
Domande frequenti
Q1. What exactly does double standard pitch circle mean and how does it work on the JG34JA01 trailer wheel?
A double standard pitch circle trailer wheel has five bolt holes positioned to simultaneously satisfy two different bolt circle diameters — in this case 114.3mm and 108mm. The geometric arrangement of the five holes is calculated so that each hole aligns correctly with both the 114.3mm PCD stud pattern and the 108mm PCD stud pattern on different hub designs. This means a single wheel fits two types of trailer hubs without any modification, reducing the number of part numbers needed when maintaining mixed-hub trailer fleets in Colombia or South America.
Q2. What is the difference between the JG34JA01 and JG34JA02 pitch circle trailer wheels, and which one should I choose for a boat trailer near the Colombian coast?
Both variants share an identical PCD 114.3/108mm bolt pattern, 63mm center bore, zero offset, and 10X4 inch size. The only difference is vent holes: JG34JA01 has 8 holes, and JG34JA02 has 6. For coastal boat trailer applications near Barranquilla or Cartagena, both perform equally well from a corrosion resistance standpoint since the surface coating is identical. The 8-hole variant (JG34JA01) provides slightly better airflow for brake cooling, which is rarely a deciding factor on lightweight boat trailers. For most boat trailer users, either variant is suitable, and the choice can default to whichever is readily available from your local trailer wheel supplier nearby.
Q3. How do these trailer wheels compare to aluminum trailer wheels in terms of weight, cost, and durability for South American conditions?
Steel pitch circle trailer wheels are heavier than aluminum trailer wheels of equivalent size but offer significantly better resistance to impact damage from road obstacles — a relevant factor on Colombian rural roads and unpaved agricultural tracks. Steel wheels are also more cost-effective to produce and repair, and surface damage that would require replacement on an aluminum wheel can often be addressed by repainting a steel wheel. For most Colombian light trailer applications where minimizing unsprung weight is not the primary concern, steel pitch circle trailer wheels provide a better value proposition than aluminum alternatives over the full service life including replacement and repair costs.
Q4. What is the correct wheel nut torque specification when installing these 10-inch pitch circle trailer wheels on a utility trailer?
For 10-inch small trailer applications with 5-bolt patterns in the 108- 114.3 mm PCD range, the recommended installation torque typically falls between 80-110 Nm depending on the stud thread diameter and nut specification used on your specific trailer axle. Always consult the trailer manufacturer or axle supplier torque specification for your exact application. Torque should be applied in a star pattern and re-checked after the first 50-100 km of service following any trailer wheel change to account for initial seating of the joint. Do not substitute larger-diameter fasteners without verifying that the bolt hole clearance in the pitch circle trailer wheels accommodates the change.
Q5. What tire size fits the 10X4 rim on these pitch circle trailer wheels, and where can I find trailer tire and wheel packages in Colombia?
The 10X4 rim accommodates tire sizes in the 3.50-10 and 4.00-10 range, which are standard small trailer tire dimensions. Complete trailer tire and wheel packages combining these rim sizes with appropriate tires are available from trailer parts distributors across Colombia. When purchasing tire and wheel packages, confirm that the tire’s maximum load rating at the intended inflation pressure meets or exceeds the rated axle load of your specific trailer divided by the number of wheels on the axle.
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