The 380900930 Wheel Rim Assembly is a genuine OEM heavy-duty steel rim manufactured by XCMG for motor graders and heavy construction equipment. This complete wheel rim assembly fits both front and rear axles on XCMG GR series motor graders, providing a robust mounting surface for off‑road tires. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts. The 380900930 wheel rim is constructed from high‑strength hot‑rolled steel plate, formed and welded with precision, then coated with a durable anti‑corrosion finish. It includes all necessary mounting studs and nuts.
Designed for GR135, GR165, GR180, GR215, GR260, GR300, and GR350 graders, the 380900930 rim meets OEM specs for offset, backspace, and load rating. The drop‑center design allows easy tire mounting, and the flange geometry is optimized for tubeless radial tires. Each rim is dynamically balanced at the factory to reduce vibration.
A damaged or bent wheel rim causes uneven tire wear, vibration, and unsafe handling. Replacing a damaged rim with the genuine XCMG 380900930 restores proper wheel geometry, eliminates steering shimmy, and prevents tire damage. The genuine assembly includes all hardware, saving the technician from sourcing mismatched parts.
| Parameter | Specification |
|---|---|
| OEM Number | 380900930 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Wheel Rim Assembly (Steel, Complete with Hardware) |
| Material | Hot‑rolled High‑strength Steel (Q345B / S355JR Equivalent) |
| Rim Diameter | 20 Inches (Standard for GR Series) |
| Rim Width | 8.00 Inches (Fits Tires: 14.00‑20, 16.00‑20, 18.00‑25) |
| Bolt Pattern | 10 Holes × M20 Studs, on 335 mm PCD (Pitch Circle Diameter) |
| Center Bore | 220 mm ±0.5 mm (Hub‑piloted) |
| Offset (ET) | 0 mm (Zero Offset for Correct Steering Geometry) |
| Load Rating per Rim | 5,000 kg (11,023 lbs) Static Load Capacity |
| Studs & Nuts Included | 10 × M20 × 1.5 Studs (Grade 10.9), 10 Cone Seat Nuts with Anti‑seize Coating |
| Surface Finish | Epoxy Powder Coat (RAL 1007 – Yellow) over Zinc Phosphate Primer |
| Standards | ISO 9001:2024, TAA (Tire and Rim Association) Standards |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350 |
| Applications | Front Steering Axle and Rear Drive Axle Wheel Positions (All Four Corners) |
The 380900930 Wheel Rim Assembly is the structural foundation for the tire and the interface between the rotating assembly and the axle hub. Motor graders operate on rough terrain where the wheels are subjected to heavy impacts from rocks, curbs, and uneven ground. A genuine XCMG rim is engineered to absorb these shocks without cracking or bending, maintaining the tire bead seal and preventing sudden pressure loss.
Proper wheel geometry is essential for tire life and machine handling. A bent rim causes the tire to run out of round, creating a vibration at highway speeds that can loosen bolts and cause driver fatigue. The 380900930 rim is precision‑formed and balanced to run true, ensuring that the tire rotates evenly across its tread. This reduces irregular wear patterns such as cupping or shoulder stepping, which can destroy an expensive tire in a few hundred hours.
The rim’s corrosion‑resistant coating is not just cosmetic; it protects the steel from rust that can weaken the metal and cause the wheel to fail. Rust can also corrode the mounting flange, making it impossible to remove the rim later. XCMG’s powder coating is applied over a zinc phosphate primer, providing long‑term protection in the presence of road salts, mud, and moisture. Replacing a rusted or bent rim with the 380900930 assembly restores the wheel’s structural integrity and extends tire life.
Each 380900930 wheel rim is manufactured from hot‑rolled steel plate that is cut, rolled, and welded using robotic submerged arc welding to ensure full penetration and a smooth weld seam. The weld is then X‑ray inspected to guarantee no internal flaws. The rim is then heat‑treated after welding to relieve residual stresses that could cause cracking under dynamic loads.
After heat treatment, the rim is machined on a CNC wheel lathe to achieve the exact bead seat profile, flange height, and bolt hole pattern. The bolt holes are countersunk to accept the cone‑seat nuts, and the stud holes are tapped (or the studs are pressed in). The finished rim is then shot‑blasted to SA 2.5, coated with zinc phosphate, and finally powder coated with XCMG yellow (RAL 1007). Coating thickness and adhesion are tested per ASTM standards.
A random sample of each batch is mounted on a tire and run on a dynamic balancer; runout is measured and must be less than 1.5 mm. The rim is also proof‑loaded to 1.5× the rated load. Counterfeit rims often skip the heat treatment or use thinner steel, leading to early fatigue. The genuine 380900930 is marked with the XCMG logo, part number, and a batch code for full traceability.
To replace a wheel rim with the 380900930 assembly, raise the grader and support the axle. Remove the old wheel, then clean the hub flange and the mounting face of the new rim. Inspect the stud threads and replace any damaged ones. Apply a thin film of anti‑seize to the studs (except the first 3 threads).
Mount the new rim onto the hub, aligning the center bore with the pilot. Install the cone‑seat nuts and tighten them by hand to ensure proper seating. Then torque the nuts in a star pattern to the manufacturer’s specification (typically 450 Nm for M20 grade 10.9 studs). After the first 100 km of operation, re‑torque the nuts to the same value.
If mounting a new tire, use a bead lubricant and inflate to the recommended pressure. The rim’s drop‑center and safety hump are designed to retain the bead if pressure drops suddenly. Always balance the tire and rim assembly after installation to prevent vibration. The genuine rim includes a factory‑applied indicator mark showing the lightest point of the rim to assist with tire mounting.
Aftermarket wheel rims are often made from lower‑grade steel, are not heat‑treated, and have inconsistent bolt hole patterns that lead to improper clamping force. They may also have poor corrosion resistance, rusting within one season. The genuine XCMG rim uses certified steel and is fully heat‑treated, delivering the fatigue life required for off‑highway graders.
Counterfeit rims may have incorrect offset, which changes the scrub radius and causes steering pull or uneven tire wear. The 380900930 has the exact zero offset specified by XCMG engineers, maintaining the original steering geometry. Additionally, genuine rims come with the correct studs and nuts; aftermarket rims often require the reuse of old, fatigued hardware, increasing the risk of stud failure.
XCMG provides a 12‑month warranty against manufacturing defects. Choose genuine for safety, handling, and maximum tire life.
Common indicators that the wheel rim 380900930 needs replacement include: visible cracks near the spokes or stud holes, a bent flange that prevents the tire bead from sealing, severe rust pitting that has penetrated more than 20% of the metal thickness, elongated stud holes (wallowed out), and difficulty balancing the tire (runout > 3 mm). Also, if the rim leaks air through the steel (porosity), it must be replaced.
Preventive replacement is recommended every 10,000 operating hours or when replacing all tires on an axle. The cost of a new rim is far less than the cost of an accident caused by a wheel separation or the downtime from a flat tire. During routine inspections, spin the wheel and look for wobble; any lateral or radial runout beyond 2 mm calls for replacement.
Keep a genuine 380900930 wheel rim assembly in your parts inventory. A cracked rim can fail catastrophically, causing the tire to separate from the machine – a serious safety risk. Having a spare rim on hand allows immediate replacement and minimizes downtime.
The 380900930 Wheel Rim Assembly is stocked in XCMG regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent breakdowns. Bulk orders (4+ rims, one set) receive volume discounts and can be shipped via sea freight.
Each rim assembly is supplied in a heavy‑duty plywood crate with a protective plastic cover and includes all ten studs and nuts (pre‑greased) and an instruction sheet. For large fleets, consignment stock programs are available to ensure immediate availability and reduced downtime. Don’t let a damaged wheel rim compromise your grader’s stability or safety.
Order the genuine XCMG 380900930 Wheel Rim Assembly today and restore the rolling integrity of your motor grader. This rim is a critical component for tire mounting, wheel balance, and safe machine operation. Keep a spare in your service inventory, and always replace with genuine XCMG parts.
Upgrade your grader’s wheel reliability with the XCMG genuine rim assembly. Engineered for strength, accurate fit, and long corrosion life – order now and experience the quality that keeps your grader stable, safe, and productive.
