Cassette Spacer Question.

[andy_wrx]

From another thread, 1st August - explains what the spacer you've got with your Mavics is about.
What I posted was about road wheels, but should equally apply to Mavic MTB wheels and Shimano 9sp MTB cassette

Mavics - Ksyriums, Cosmics, Aksiums - have the Mavic M10 hub, which is a Mavic-fit hub not 'proper' Shimano although it has Shimano splines.

It can take Campag or Shimano, because as well as taking Shimano cassettes, Mavic sell Campag-spaced but Shimano-splined 10sp cassettes which fit on it.

The Campag cassettes are a bit wider than Shimano, so to fit Shimano you also need a Mavic spacer (a 2.something mm big thin washer basically) which will be supplied with the wheels.

A Shimano 10sp cassette is actually narrower than Shimano 8 or 9sp cassettes, so when you get a new 10sp cassette it comes with a thin spacer (1.something mm) and you fit this to Shimano wheels which are 8/9/10sp compatible.
(Shimano also make some 10sp-only hubs, some rarer Dura Ace/Ultegra models, and on these a 8 or 9sp cassette will be too wide and you won't be able to get it on)

But for you, with Mavic M10 hub
- to fit 8 or 9sp Shimano, you'd use the Mavic spacer between the hub and cassette
- to fit 10sp Shimano, you'd use the Mavic spacer and the Shimano 10sp spacer
(and to fit Campag, you'd use simply the Mavic Shimano-splined but Campag-spaced cassette and no spacers)

 

[Mr Pig]

From what you're saying then there are no spacers fitted behind the freehub and I'll need to fit the one that came separately.

I think! ;0)

 

[Mr Pig]

Like Duh! Turns out the washer 'does' fit over the freehub behind the cassette! I couldn't get it to fit because I had it the wrong way round.

Yes, you all have permission to call me an idiot ;0)