11 speed upgrade, indexing problem
I've upgraded my bike to 11 speed Shimano from 10spd Shimano. Have upgraded shifters,cassette but kept crank set and rear mech. LBS says this should work okay, but indexing proving difficult. Setting up on the big ring and smallest ring on the cassette, I can get it set to drop only 2 gears before it chatters and wont go any further. Resetting from that gear only allows it to drop 2 gears again but wont go back up. Cable tensions are good. Do I need to change the rear mech/crank set or is there something else. Any useful advice gratefully received.