Should a 10 speed cassette fit and work properly on a Tiagra hub? I am most certain the hub I'm thinking of was built to run no more than 9 speeds. Everything appears to work (fit, spacially) OK except it seems impossible (or at least very difficult) to to run the large cog (23t) in the rear with the small chainring (39t) in the front without the RD barely scuffing spokes (non-aero, nothing special...32H Alex rim as a take off from someone else's bike....this is a Franken-build for me). I am assuming I just need to do a better job of re-dishing the wheel, but thought I should ask here and see if I'm just running up against the design limit trying to fit two sets of kit that don't work together. So, question is; possible (and just re-dish appropriately)? or not?
And, since everyone does better with graphical cues, here's a pic of the bike it's for:
Thanks in advance.