UCI Rules
🏛️Official — UCISection 2: Equipment
Verdict
Bicycle frame: rigid or suspended; minimum wheel diameter 26" (66 cm), max 29" (74 cm); 27.5" and 29" dominant in pro XCO; Hydraulic disc brakes required at UCI level (front + rear); Handlebar width limited to 1000 mm max
Send this to your friend — argument over.
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