Are Campagnolo 11s and 12s left arms compatible?
Moderator: robbosmans
I have a Stages 11 speed Campagnolo left. I'm wondering if I ever upgraded to 12 speed whether the left crankarms are dimensionally compatible and would work together.
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Unfortunately no, Campagnolo 11spd and 12spd crank arms are not interchangeable. On 11spd cranks, the crank bolt passes through the right crank and screws into the left crank; on 12spd cranks, the bolt passes through the left crank and screws into the right crank.