Split OTR rims are widely used on loaders, underground LHD, mining haulers and earthmoving machines. The most common types are two-piece and three-piece rims. Anqiang breaks down their differences in simple terms to help you choose.
Two-Piece Rim
It consists of only two main parts: rim base + lock ring.
Advantages
- Simple structure, fewer parts. Lower risk of parts shifting or failure.
- Easier and faster to assemble and inflate.
- Good for regular tire replacement jobs.
- Lower maintenance cost.
Disadvantages
- Limited size range. Not suitable for extra wide or special offset tires.
- Less flexible for custom adjustments.
Best for ：General mining loaders, underground LHD, standard construction machines, sites with frequent tire change and ordinary impact conditions.
Three-Piece Rim
It is made up of three parts: rim base, lock ring and side ring.
Advantages
- More flexible. Supports wider tires and special offset requirements.
- Better adaptability for custom mining equipment.
- Easy to replace the side ring separately if it gets damaged, no need to change the whole rim.
Disadvantages
- More components. Higher requirement on machining precision.
- Higher risk of air leakage or ring jumping if fitting is poor.
- Slower mounting and inflation. Workers need stricter operation rules.
- Higher purchase and inspection cost.
Best for ：Wide-body mining trucks, large quarry machines, special modified equipment, heavy impact sites that need custom rim width.
Quick Comparison
| Item | Two-Piece Rim | Three-Piece Rim |
|---|---|---|
| Parts | Base + lock ring | Base + lock ring + side ring |
| Operation | Simple, fast | Complex, strict safety rules |
| Leak risk | Lower | Higher |
| Custom width | Limited | Flexible |
| Repair cost | Lower | Higher |
| Suitable scene | Standard LHD, loader | Large mining truck, wide tire |
Key Points to Choose
- If your machine uses standard tire size, you change tires often and want stable performance: pick two-piece rims.
- If you run wide tires, special offset or large heavy-duty mining trucks: three-piece rims are more suitable.
- Safety reminder: Both are split rims. Always follow standard inflation safety procedures. Wrong assembly may cause serious accidents.
- Confirm machining tolerance and NDT inspection before purchase.
There is no absolute better one. The choice depends on your tire size, machine type, working site and your team's maintenance ability. Send your equipment parameters to Anqiang, we can match the proper split rim solution for you.