How smooth should the action be when moving pedals backwards? Fixed slow rear tyre puncture last night - also checked bearings added grease in. All good - axle nice & smooth. But noticed that there's a 'chain catching - notchy action' when rotating pedal backwards - even with chain mid cassette - & 39t middle chain ring. BB action is very smooth. FD is not connecting chain. Seems like chain not aligned on rear mech / chain catching cassette teeth as it moves, but can't see what. Have released RD cable and reconnected. No cigar. 10 speed drivetrain - all 105 (triple) with Deore M591 9spd rd.
Any ideas?