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The rear wheel hub is a pivotal chassis component that supports the wheel and transmits driving torque from the axle shaft to the wheels. For SINOTRUK HOWO heavy-duty trucks, the OEM number WG7121340309 identifies a high-strength, precision-engineered hub assembly designed to withstand extreme loads and harsh operating conditions. As a trusted supplier of Sinotruk howo parts, Deruna offers this genuine rear wheel hub, manufactured to exacting factory specifications.
This hub is cast from high-grade ductile iron, machined to tight tolerances, and undergoes rigorous quality checks to ensure perfect fitment and long service life. Whether you are overhauling a rear axle or replacing a damaged hub, this component delivers the reliability and performance that SINOTRUK HOWO trucks are known for.
OEM direct replacement – no modifications needed | Engineered for SINOTRUK HOWO rear axles
Rear Wheel Hub
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This rear wheel hub is a critical driveline component that provides the mounting surface for the wheel and houses the bearings that allow smooth rotation. It is specifically engineered for SINOTRUK HOWO heavy-duty trucks, offering exceptional strength, dimensional accuracy, and fatigue resistance. The hub is manufactured using a ductile iron casting process that yields a microstructure with superior toughness and elongation, capable of absorbing shock loads encountered during off-road hauling and heavy braking.
Every hub is precision-machined on state-of-the-art CNC equipment to ensure that the bearing bores, bolt holes, and flange faces meet the strictest OEM tolerances. This guarantees proper wheel alignment, minimal vibration, and even tire wear. The design also promotes efficient heat dissipation from the brakes, enhancing braking performance and reducing thermal damage to bearings and seals.
Choosing the genuine WG7121340309 rear wheel hub means investing in a component validated through extensive testing, including dynamic load simulations and corrosion resistance trials. It is the ideal choice for fleet operators and workshops that demand uncompromised quality and durability.
| OEM Number | WG7121340309 |
| Part Name | Rear Wheel Hub (without bearings / bolts) |
| Brand | SINOTRUK HOWO |
| Component Category | Chassis / Axle Hub |
| Material | Ductile iron (ASTM A536, grade 65-45-12 or equivalent) |
| Weight (approx.) | 22.3 kg (49.2 lbs) |
| Hub Outer Diameter (flange) | 365 mm |
| Bearing Bore Diameter (inner) | 150 mm (for tapered roller bearings) |
| Bolt Circle Diameter (BCD) | 335 mm |
| Number of Wheel Stud Holes | 10 holes (M22 thread) |
| Overall Height (hub) | 158 mm |
| Maximum Static Load Capacity | ≥ 150 kN (radial) |
| Operating Temperature Range | -45°C to +140°C |
| Surface Coating | Zinc-rich primer + topcoat (corrosion protection) |
| Balancing | Dynamically balanced to ≤ 5 g·cm |
| Bearing Type Compatibility | Tapered roller bearing set (two bearings) |
| Application | SINOTRUK HOWO A7, T7, 6×4, 8×4, and most heavy-duty models with drum brakes |
All values are based on OEM engineering drawings for the WG7121340309 hub. Minor deviations may occur due to casting tolerances.
The hub is cast from ductile iron, offering superior tensile strength and impact resistance compared to standard gray iron, reducing the risk of cracking under shock loads.
The bearing journals are machined to tight tolerances, ensuring proper bearing fit and alignment, which reduces vibration and extends bearing life.
A durable zinc-rich primer and topcoat protect the hub from corrosion, even in salt-spray environments, ensuring long-term reliability.
Each hub is dynamically balanced to minimize rotational imbalance, enhancing ride comfort and reducing wear on suspension and steering components.
The geometry promotes efficient heat transfer from the brake drums, reducing the risk of brake fade and thermal damage to bearings.
With robust material and precision engineering, the hub offers a long operational lifespan, reducing axle overhaul frequency and lowering total ownership costs.
The rear wheel hub is a safety-critical part that directly affects wheel retention, brake performance, and axle alignment. Using a counterfeit or substandard hub can lead to premature bearing failure, wheel wobble, or even catastrophic wheel detachment. The genuine WG7121340309 hub eliminates these risks through OEM-grade quality and rigorous testing.
Key benefits of choosing the authentic hub:
Deruna sources this hub directly from authorized manufacturers, ensuring every unit meets SINOTRUK HOWO’s strict quality requirements. We package each hub securely to prevent damage during shipping, so it arrives ready for installation.
Proper installation and regular maintenance are essential to maximize the service life of your rear wheel hub. Follow these best practices:
Before installing, thoroughly clean the axle spindle and inspect the hub bores for burrs or debris. Use a lint-free cloth and solvent.
Apply generous high-quality wheel bearing grease to bearings and the bore before assembly to ensure adequate initial lubrication.
Tighten the axle nut to the manufacturer’s recommended torque. Over-tightening can cause preload issues; under-tightening leads to play and vibration.
Check the hub for looseness, noise, or grease leakage at every scheduled service. Re-torque wheel nuts after the first 500 km.
Always refer to the SINOTRUK HOWO service manual for detailed axle assembly procedures, bearing preload settings, and specific torque values. Proper maintenance ensures safe and reliable operation for millions of kilometers.
This rear wheel hub is compatible with a wide range of SINOTRUK HOWO heavy-duty trucks, including:
For models not listed, cross-reference your original hub part number with WG7121340309. In most cases, this hub directly replaces the original on all SINOTRUK HOWO rear axles with 10-hole wheel mounting patterns and similar flange dimensions.
The WG7121340309 rear wheel hub is a cornerstone of the SINOTRUK HOWO chassis, providing a robust and precise mounting platform for wheels and brakes. Its ductile iron construction, precision machining, and protective coating ensure it withstands the rigors of heavy hauling, off-road operation, and extreme climates.
By choosing the genuine hub, you avoid the pitfalls of counterfeit parts – poor fitment, premature wear, and safety risks. Instead, you invest in a component validated by SINOTRUK HOWO and trusted by fleets worldwide. Its balanced design, heat dissipation, and corrosion resistance contribute to lower maintenance costs and higher vehicle uptime.
As a reliable supplier of Sinotruk howo parts, Deruna is committed to delivering this hub with the highest level of quality assurance. Every unit is inspected to meet OEM specifications, giving you confidence in your purchase.
Equip your SINOTRUK HOWO with the genuine WG7121340309 rear wheel hub – built for strength, precision, and long-term reliability.
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