I am in the middle of converting my bike with road handlebar to a flat bar. The old road bar has a Shimano 105 brake/shifter and 105 derailleur. Something like this: https://www.mec.ca/en/product/5055-021/105-ST-5700-L-STI-2x10-Speed-Lever-Set

The bike is a 10 speed.

I bought some Tiagra Road flat bar shifters: SL-4700-R 10s and SL-4703-L

The Left hand SL-4703-L works perfectly. However, the SL-4700-R right side shifts up nicely for about 4 to 6 rings, and then skips a ring. Playing with the tension just changes which ring gets skipped.

I take it I screwed up and the new shifter is not compatible with the derailleur / cassette.

Is my only option to return the shifters and try to find something else?


Edit: Found a video -

  • Had the same issue - lots of head scratching - get an 11 speed rear mech and all should be fine. Jul 1, 2020 at 13:04

1 Answer 1


Correcto, unfortunately for you, the latest (4700) Tiagra system uses a different cable pull to previous 10-speed groupsets, therefore the shifters are pulling the wrong amount of cable for your derailleur. It won't get better, however much you change the tension.

You could get a new 4700 derailleur, which would match the shifter and work with the existing cassette, keeping the flat bar.

  • 4
    Tiagra 4700 strikes again! Apr 12, 2020 at 21:57
  • Tiagra 4700 derailleurs are reasonably priced, too. Especially so in the used market or new take- offs.
    – Jeff
    Apr 13, 2020 at 11:57
  • Or get a 105 11 speed rear mech for a couple of quid more Jul 1, 2020 at 13:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.