Wheel Collision straightening and bending process

When determining the extent of damage to the wheel, the following parameters are examined:

  • The damage to the wheel

  • Its radial runout

  • Its lateral runout

  • The length of the damaged zone

While the damaged wheel is being rigidly held in the straightening apparatus, heat is applied to the wheel to raise its temperature to its somewhat softened state. Thereafter and/or simultaneously therewith, a force is applied to the damaged zone, urging the wheel to return to its approximately true, original shape. The process further comprises rotating the rigidly-held wheel, while it is in its somewhat softened state, between oppositely positioned compressing rollers or radial tooling member, until the wheel is transformed from its approximately true shape to its true, original shape. This process can be summarised as shown in the diagram below.

WC Repair Process May21.jpg

1.         Metallurgical requirements

Wheel Collision metallurgical requirements include:​

  • Cast aluminium wheel crush test procedure

  • Penetrative testing enables hairline cracks (not visible to the naked eye) to be identified, this process is also used in the aviation industry to identify hairline cracks on aircraft

  • Aluminium wheel inspection by real Time X-Ray imaging allows hairline cracks (not visible to the naked eye) to be identified.

 2.       Integrity Assessment of Repaired Wheels

The Wheel Collision Integrity Assessment process was a collaborative effort between Lehigh University and Wheel Collision Centre in the United States to create tests which validate repair integrity when rim repairs are complete.


Integrity assessment thus assures that the structural integrity of the wheel is maintained after the repairs are done. This is proof that wheels are 100% repaired. For the first-time clients, have physical proof! Defects in the radioscopic image (image 1) are detected by a wheel inspector (image 2) as shown below.

how to reair a damaged rim, the x-ray of the rim