Swiss Side criticizes UCI for new rules limiting wheel depth to 65mm, describing this as misguided. The organization highlights studies showing that deeper wheels, like their Hadron 3 68mm, offer stability contrary to UCI assertions. Additionally, the UCI's rules are part of a broader attempt to reduce race speeds. Swiss Side also raises concerns regarding injury risks linked to a new 40cm minimum handlebar width, particularly impacting female riders, and critiques the timeline for these regulations set for January 1st, 2026.
Rim height has a limited impact on stability, predictable handling and safety. Through the objective measurement of the steering moment, we can firmly state that rim depth has far less influence than tyre width, tyre tread pattern, and the steering geometry of the bike frame.
The UCI's new rules limiting rim depth to 65mm aim to improve rider safety, citing susceptibility of deeper rims to crosswind deflection and the quest to reduce overall race speed.
Swiss Side highlights the potential injury risks posed by new handlebar width regulations, stating that the 40cm minimum could compromise the safety and fit for female riders.
The implementation timeline for the UCI's new rim depth rules, starting January 1st 2026, has drawn criticism for lack of consideration regarding the impact on competitive riders.
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