Originally Posted by
stephr1
the hub on the bike now is a Hyperglide-C. I thought I heard/read something somewhere about a difference in mounting requirements for the cassette/gears....possibly in going from a 7 to an 8/9 freehub. Or is that just specific to mounting on a Hyper-C as opposed to a non-C freehub?
Also, any general sense of how much play (runout?) there should be on the hub? I have a bit of play, but the shifting is still pretty solid (bike/freehub has 15K+ miles, cassette/chain less than 3K). Only a slight "hiccup" when going from 5th to 6th (but not from 7th to 6th). Maybe I shouldn't be too worried about the hub at the moment and just replace the cones (which I know is needed).
The "C" means compact, which just means it allows the use of an 11 tooth sprocket. If you want to use an 11T sprocket on your new Freehub, you need a Hyperglide-C unit. See the difference:
http://www.sheldonbrown.com/k7.html#hyperdrivec
All Freehubs I've worked on do have a little play, even when brand new. If yours still freewheels fine and doesn't have any other issues I wouldn't bother replacing it. Unless you want to upgrade to 8/9/10 speed.