Folks, I need a hand. Does anyone know of a bike mechanic that can diagnose problems via FaceTime or another audio/video app?
I ride strictly indoors (I’m in Iraq) and there’s a knocking coming from the crank/BB area that I haven’t been able to fix.
Equipment: Cervelo S3 (rim), Sram BB30, Rotor 3D+ cranks, Rotor 54/42 oval rings, Sram eTap, Speedplay Zero stainless steal, NOT ceramic BB
Each time either shoe passes the top of the crank circle I get a good 'thunk' sound. I can hear it and I can also feel it resonate in the carbon frame, no matter speed, RPM or watts. My cleats are on tight, pedals on tight, I removed the cranks and reinstalled them to spec, bolt rings are tight. I put my finger and turned both bearings using my finger tip. Both bearings are still ultra smooth.