ProX MTB Carbon Rims Pass 120J UCI Impact Testing! Jul 12, 2021

Considering there are many jump behaviors during MTB bike riding, impact testing is critical important for MTB carbon rims.

UCI impact test standard only requires that MTB rims should pass 60J impact testing.

We set our test standard much higher than 60J, to make sure our rims are strong enough for different usage.

All ProX MTB carbon rims must pass UCI impact testing before mass production.

ProX MTB carbon rims UCI impact testing


The detail of ProX MTB carbon rims impact testing standard can be found in below table.

ProX MTB Carbon Rim UCI Impact Test
Test Condition:
1. Falling mass: cylinder shape, weight 22.5kg, with solid rubber pad on the contact surface.
(rubber pad should be in good condition, 10mm thickness, Shore hardness A=50+/-5).
2. Fix built wheel (with no tire) on UCI impact testing machine.
3. Raise the falling mass to specific height from rim surface. (to reach different impact energy)
4. Release the mass, free fall to the rim (the position between two spoke holes).
5. Testing starts from height 217mm (48J), then to 272mm (60J)....until 544mm (120J).
6. Each height test for 2 times, and there should be no any crack or damage on the rim.
Impact Energy (Joule) 48J 60J 70J 80J 90J 100J 110J 120J 130J 140J
Testing Height (mm) 217 272 317 363 408 454 499 544 590 635
XC-GP OK OK OK OK
XC OK OK OK OK
TR OK OK OK OK OK
AM OK OK OK OK OK OK
EN OK OK OK OK OK OK OK OK
DH OK OK OK OK OK OK OK OK OK

The following video shows the testing of our MTB carbon rim PAD938-EN, which has passed 120J impact testing, without any damage.

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