9 / 10sp compatibility question

have a sora 9sp lever paired paired with a 10sp tiagra rear mech, is this gonna work? it sort of does, but not amazing…

flat bar road shift lever*

yes should work fine as far as cable pull goes

100% compatible unless it’s the latest 4700 tiagra mech which looks more “11sp” like.

If it doesn’t work proper and the lever and mech are fine, your B-screw / cable&housing might need work.

called shitmano and they were all nah bro, but seems to be sweet, cheers, I did think all 9/10 was incompatible, bit of research and this norco came stock like this, all good

9/10 mtb is incompatible
9/10 road is compatible