Concept2 Forum

That's a common issue with the C2 Bikeerg, see here. <-- This issue appears to be caused by the cranks coming loose due to C2's inferior crank attachment design consisting of a tiny screw on the end, and 2 small bolts held on only by pressure which eventually slide sideways and cause the thumping. ...

Hello, I don't know if I am tripping or not but i feel like for the last week my bike is not running as smooth as it used to. It kind of feels like there is a barely noticeable "bump" when pedalling once per turn. I am not sure anymore if it is normal and because I just noticed now am hyper focusing...