for me the whole derailleur shakes, they replaced my derailleur at the service station, I drove 100 m, tried about two bunny hops and it started again, dont you know what it could be
I will say, cycling ASSOCIATES with very very sharp sight and ears MAY follow a rider around, then stop to help? when the maladjusted derailleur cage shifts all the way into the wheel spoke, then winds the deraileur cage around the gear rings.😮
