Flat bar road bike conversion, Ultegra 10 speed throughout but with Tiagra 4600 flat bar shifter.
When Im trying to accelerate as hard as possible after finally getting to point downhill after struggling up it, when working my way down the cassette into successively smaller sprockets under power each shift down is always so jolting and clunky. Almost to the point of unsettling my feet off the pedals. (I dont use clipless pedals on this bike)
a) Do I simply need to learn to shift better and ease off a little when shifting to avoid the jarring clunk as the chain catches on the next smaller cog
b) Is that just how normally clunky the Tiagra flat bar shifter is, it just ‘releases’ the gear that ‘joltingly’? Cam anyone say from experience if the 105 rs700 flat bar shifter is smoother (which would mean going 11spd of course so new RD and cassette)
c) It seems both road and mtb 10 spd cassettes have same sprocket widths and sprocket pitches ie distance chain is shifted is identical. In which case I could just go 10spd XT shifter and XT derailleur. Is XT shifter better quality/performing/smoother than the 105 flat bar shifter?
c) Or Is there something likely faulty with my setup? 6700 derailleur under too much tension or my tiagra flat shifter is broken?
Sorry I know that was long but really appreciate any insight from those with more experience, thanks