BIKE 04/2025
Reading time 0:30 minutes

Failures in the test

In the e-all-mountain test in BIKE 2/25 we reported on problems with Sram's Transmission groupset and a crash-induced fork failure on a Fox 36. We digged deeper:

© BIKE

FOX 36 As a result of a crash the fork crown on one of our test bikes broke. The subsequent analysis at Zedler Institut für Fahrradtechnik und -sicherheit was able to rule out a material defect on the part of the manufacturer. Fox was also able to examine the affected fork in detail afterwards. “In Fox's internal test stand torsion tests up to component failure, fork crowns usually break at an applied force of 350 to 450 Nm. The fork from the BIKE test appears to have been subjected to higher forces due to a serious crash. We conclude this from an unusually strongly bent thru-axle (picture), dropouts that are badly twisted and distorted, and the fork crown that shows a double fracture. In our analysis, the fork from the BIKE test did not reveal any component fatigue or pre-damage.”

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Author: Georg Grieshaber

 


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