OTR (Off-The-Road) steel rims are core load-bearing components for heavy off-highway equipment including mining excavation, quarrying, large-scale infrastructure construction and port handling. Different from steel rims for ordinary highway vehicles, OTR rims are required to withstand heavier loads, harsher working conditions and stricter reliability standards. This guide delivers comprehensive purchasing references for global mine operators, construction equipment buyers and mining service providers.
What Is an OTR Steel Rim?
An OTR steel rim is a load-bearing rim specially designed for heavy-duty off-the-road machinery, mainly matched with the following equipment:
- Wide Body Dump Truck: Rated load from 30 tons to 400 tons, fitted with extra-large rims ranging from 29 inches to 63 inches
- Articulated Dump Truck / Rigid Dump Truck: Equipped with 25-inch to 35-inch engineering rims
- Wheel Loader: Matched with 20-inch to 25-inch engineering rims
- Grader: Fitted with 20-inch to 24-inch engineering rims
- Road Roller: Equipped with 15-inch to 20-inch engineering rims
- Drilling Rig: Matched with special-specification engineering rims
Core Specification Parameters of OTR Steel Rims
| Parameter | Example | Description |
|---|---|---|
| Nominal Diameter | 29" | Matches the inner diameter of tires |
| Section Width | 13.00" | Rim width |
| Flange Height | 2.5" | Height of the rim flange |
| Bolt Circle Pitch | 10×335 | Number of bolts × Diameter of bolt circle (mm) |
| Center Bore | Φ281 | Diameter of the central hole (mm) |
| Offset (ET) | ET0 | Offset of the mounting surface |
Material Selection for OTR Steel Rims
Q235B (Common Carbon Structural Steel)
- Yield Strength: 235 MPa
- Application: Standard load, regular working conditions and ordinary mining sites
Q355B (Low-Alloy High-Strength Steel)
- Yield Strength: 355 MPa
- Application: Heavy-load mines, bumpy roads, ramp operations and cold environments
Q420 / Q460 (High-Strength Alloy Steel)
- Yield Strength: 420 / 460 MPa
- Application: Ultra-heavy loads, extreme working conditions and high strength requirements
Ductile Iron (Cast Components)
- Properties: Comprehensive mechanical properties between ordinary steel and high-strength steel, high compressive strength
- Application: Integrally cast wheel discs and complex structural parts
Quality Certifications and Testing Standards
Qualified OTR steel rim manufacturers shall hold the following qualifications and certifications:
| Certification / Test Item | Description |
|---|---|
| ISO9001 | Quality management system certification (basic requirement) |
| IATF16949 | Quality management system certification for the automotive industry |
| High-Tech Enterprise | Proof of independent R&D capability and technical strength |
| Mechanical Property Test | Tensile strength, yield strength, elongation and impact toughness |
| Salt Spray Test | Anti-corrosion performance verification (≥500 hours) |
| Fatigue Test | Heavy-duty cyclic fatigue test (in accordance with industry or customer standards) |
Evaluation of Customization Capabilities
A manufacturer's customization capacity is a key consideration when purchasing OTR steel rims.
Size Customization
- Size Range: 5 inches to 35 inches (Dongheng supports full-range customization)
- Non-standard Sizes: Special offsets, custom bolt circle pitches and special widths
Material Customization
- Standard Materials: Q235B, Q355B
- High-Strength Materials: Q420, Q460, 16Mn, etc.
- Special Requirements: Custom material ratios formulated per customer requests
Process Customization
- Tube-type / Tubeless
- Solid Wheel
- 3-Piece / Single-Piece Rims
Lead Time & Minimum Order Quantity (MOQ)
| Item | Standard Products | Custom Products |
|---|---|---|
| MOQ | Varies by specification | 1 piece minimum order |
| Production Lead Time | Depends on size and quantity | Starts from 22 working days |
| Shipment Period | 7 working days after production completion | 7 working days after production completion |
| Ocean Transit Time | 25–35 days from major Chinese ports to destination ports | 25–35 days from major Chinese ports to destination ports |
Why Choose Dongheng Wheels?
Henan Dongheng Wheel Co., Ltd. has specialized in OTR steel rims for many years with the following core advantages:
- Large-Scale Production Capacity: Annual output of 300,000 sets of steel rims and 200,000 wheel disc accessories, stably meeting bulk purchasing demands
- Full-Range Customization: Complete series of engineering rims from 5 inches to 35 inches, supporting non-standard custom sizes
- Diverse Material Options: Full lineup of materials including Q235B, Q355B, Q420, Q460 and ductile iron
- Authoritative Certifications: High-tech enterprise certified with ISO9001 and IATF16949, delivering reliable quality
- Supporting Service for Leading OEMs: Mass supplier to major domestic complete vehicle manufacturers such as Tongli Heavy Industry, Taiyuan Heavy Industry and Sany Heavy Industry
- Global Export Business: Products exported to dozens of countries and regions across Southeast Asia, Africa, the Middle East and Latin America
- Flexible Commercial Terms: Custom orders available starting from 1 piece; payment term: 70% deposit, 30% balance settled before shipment
Contact Us
Henan Dongheng Wheel Co., Ltd.
Address: No.103, Dayong Industrial Park, Northeast Corner of Chuangye Avenue & Yizheng Road Intersection, Yigou Town, Tangyin County, Anyang City, Henan Province, China
Main Products: Wide-body mining truck rims, three-piece heavy-duty truck rims, roll-formed engineering vehicle rims, full series of wheel disc and ring accessories
Sizes: Full coverage from 5 inches to 35 inches
Materials: Q235B, Q355B, Q420, Q460, Ductile Iron
Certifications: ISO9001, IATF16949
Annual Capacity: 300,000 sets of steel rims + 200,000 pieces of accessories
- Target Markets: Southeast Asia | Africa | Central Asia | Middle East | Latin America | South America
We sincerely look forward to establishing win-win cooperation with global mine clients and construction equipment purchasers!