pcsanity1

I just replaced my cassette for the first time by myself.

Of course I bought the tools to remove / replace and everything seemed to go successfully, but I have one question...

How do I know how tight to thread the cassette back on?

Thanks

RegularGuy

I think the spec is to torque the cassette lockring down to 20 ft/lbs. I've never bothered with a torque wrench for this job, though, and never had any problems. Just wrench it down "finger tight" and give it about another 1/2 turn. If the cassette doesn't wiggle around, it's tight enough.

Dave Stohler

Cassettes don't thread-they slide on. Are you maybe talking about the locking ring?

lamajo25

My understanding with Threaded ones as you pedal it will tighten itself more and more as you go until it's tight enough. And it apparently knows when to stop.

Don Cook

RegularGuy just about nailed it exactly. The installation instructions that came with my DuraAce cassette gave a specification in Inch/Lbs. When converted it came out to approximately 24ft./lbs. If you tighten it to 22-24 ft/lbs it will be plenty tight. However that is quite a bit tighter than finger tight plus a half turn.
But then again, RegularGuy might have some really unusual fingures.

RegularGuy

Hmmm...maybe I do have some unusual fingers at that.

22 foot pounds isn't really that much torque. By "finger tight" I mean that I put the tool in the lockring and tighten it down by hand until it doesn't want to go anymore. Then I put a 10 inch crescent wrench on it and give it about a half turn. If the cassette doesn't wiggle back and forth on the freehub body, it's tight enough. If there's a little play in it, I tighten it down some more. It's easy to overtighten the cassette lockring. Overtightening may damage the lockring, though it's more likely to just make it really, really hard to remove again.

Anyway, it's not rocket surgery....

pcsanity1

Yep, I intended to say lockring.....brain spat.

Thanks everyone.

djbowen1

whoops