ozbikebuddy said:
I'm running a 10s cass, chain and flat bar shifter, with an Altus rear mech. The mech doesn't have enough range of movement to cover the 10 cogs as it was designed for 7 speed.
I currently have no way to span the cass from top gear to bottom. the range is limited. I cannot shift to the largest cog near the spokes, and the chain skips off the cass when in the smallest cog at the opposite end of the gear range.
I think changing to a tiagra mech will increase the range being able to cover all 10 gears as 9s runns on the same cass body. an added benifit is the shorter cage on the mech. This with the smaller jockey wheels will yeild a little extra chain length which would also be a bonus.
I have attahed aa pic of the beast.
:thumbsup:
Admittedly, I'm not up on mtn bike components, but I'm surprised your RD's range is that limited. Generally speaking, Shimano road bike RD's are more compatible.
Considering my lack of mtn bike expertise take my advice with a grain of salt, but if you're running a 10 spd shifter, cassette and chain, the Tiagra RD should work fine. You'll have to shorten the chain some to compensate for the short cage and smaller pulleys, but that's a minor issue.
HTH, but hopefully another member will offer a more learned opinion.