Recommendations for the selection of 20-inch rims for trucks:
- Construction site spoil and frequent tyre changes → Choose two-piece or three-piece split tyres for easy fitting and removal.
- Short-haul standard loads and a desire for low failure rates → Opt for 20-inch solid tyres, which eliminate the risk of rim rings coming loose.
- Heavy-duty tippers in mining areas → Select split tyres with reinforced rims and grooves to strengthen load-bearing areas.
Material and Manufacturing Process Selection
- For heavy-duty applications, Q355 high-strength steel must be used; standard low-carbon thin steel sheets should be avoided, as thin materials are prone to deformation and buckling under heavy loads.
- Check welding processes: give preference to fully automated welded products, where welds are full and free of porosity or incomplete fusion; hand-welded products are prone to weld cracking, so exercise caution when selecting them.
- Outdoor/construction site environments require dual-layer corrosion protection comprising electrophoretic coating and powder coating; simple single-layer paintwork will rust within a short period.
Details of Incoming Goods Inspection
Visual inspection
The wheel rim must be free from dents, oval deformation and curled flanges; split-type wheel clamps must be free from notches and deformation (clamps with damage must be scrapped immediately).
01
Weld Inspection
The entire circumference of the weld must be free from cracks, slag inclusions and missed welds; the junction between the rim and the spokes is a key inspection area.
02
Component Verification
Two-piece or three-piece locking rings, retaining rings and seals must be original manufacturer sets; mixing components from different manufacturers or combining new and used parts is strictly prohibited.
03
Roughness Spot Check
Place the rim flat and roll it; there must be no noticeable wobble. Excessive roughness will cause vehicle vibration and abnormal tyre wear.
04
Installation Safety Principles
Installation must adhere to the following six principles: safety first, correct specifications, thorough cleaning, accurate torque, correct sequence, and timely re-inspection. It is recommended that the work be carried out by qualified technicians using specialist tools.
| Incorrect procedure | Potential risks | Correct procedure |
| Installation with incorrect specifications | Wheel detachment, steering failure, tyre blowouts | Check all parameters and consult a qualified technician if necessary |
| Inadequate cleaning | Bolt loosening, hub deformation, vibration | Thoroughly clean with a wire brush and detergent, removing all foreign objects |
| Using an air gun for final tightening | Loss of torque control, thread damage, deformation of the mounting surface | Use an air gun only for pre-tightening; final tightening must be performed with a torque wrench |
| Failing to tighten in sequence | Uneven stress on the wheel hub, poor sealing | Strictly follow the diagonal cross-tightening method |
| Neglecting re-inspection | Bolt loosening whilst driving, wheel detachment | Torque must be re-checked after 50–100 km |
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