Help please! 9 speed cassette on new 10/11 speed wheel??

adskis

Will it work?

I am running 9 speed setup on my commuter bike and the rear wheel is knackered.
I have found a reasonably tough looking 32h wheelset online and it looks okay.
Only thing is the ad says 10/11 speed freehub.

So the question is, can I transfer my 9 speed cassette onto the new 10/11 speed freehub wheel?
Do I need spacers or something?
Please help.

k-dog

Yes, you need a spacer behind the cassette. Not a problem though - cassettes come with them or a LBS should be able to give you one.

adskis

Thanks for the speedy reply k-dog.
When I first started looking at this, I began to doubt myself. Then I just got all confused.

I have done it the other way round. I had a 9 speed wheel and used it on my 10 speed road bike with a little spacer.
But I thought 9 speed was wider than 10 speed. Therefore you can go one way but not the other.

So my fear is, the new 10 / 11 speed wheelset will be too narrow to run a 9 speed cassette.

Or am I just wrong?!?!?!?

k-dog

Yes, you are wrong!

9 and 10 are the same width - the internal spacing changed to allow more gears to fit.

11 speed cassettes are wider so they need a wider freehub body - but the narrower 9 and 10 will fit with a spacer.

The only thing you can't do is put 11 speed on a 9/10 hub as it won't fit.

dj58

Going to eleven, Mavic, and more

Many of you have heard that the new 2013 Dura Ace 9000 is going to 11-speed. You may have also heard that it requires yet another – newer – freehub. The splines are the same short style as the 9/10 freehub, but the total length of the freehub is longer by 1.85mm (to accommodate the additional cog). This means that if you have an old wheel with a 9/10 freehub, you cannot use it with an 11-speed cassette. You must buy a new wheel that is 11-speed. However, the 11-speed wheels are retro-fittable for 9 and 10-speed. They come with a 1.85mm spacer to take up the extra slack. If you have a 9-speed cassette, you only use the 1.85mm spacer. If you have a Shimano 10 cassette, you use the 1.85 PLUS the 1mm 10-speed spacer.

Full article here http://www.slowtwitch.com/Tech/Cassette ... _3257.html

svetty

k-dog wrote:

Yes, you are wrong!

9 and 10 are the same width - the internal spacing changed to allow more gears to fit.

11 speed cassettes are wider so they need a wider freehub body - but the narrower 9 and 10 will fit with a spacer.

The only thing you can't do is put 11 speed on a 9/10 hub as it won't fit.

No, the 10speed is 1mm narrower than the 9 speed - hence 10 speed cassettes are supplied with a 1mm spacer

k-dog wrote:

Yes, you need a spacer behind the cassette. Not a problem though - cassettes come with them or a LBS should be able to give you one.

Not so - the 1.85mm spacer should come supplied with the wheel - the cassette won't be supplied with it.

Giving out incorrect advice isn't ideal, especially not once but twice in the same thread..........

adskis

So just to check:

Of the three, 11sp is the widest, then (in descending order) 9sp next and 10sp is the narrowest.

If the wheelset fits 10 / 11sp then it will be as wide as 11sp. Therefore, it must also fit 9sp but they just wanted to save some ink in the description.

So if I want to use on the 9sp bike, I put the small 1mm spacer behind the cassette
If I want to use on the 10sp bike, I will put the wider 1.85mm spacer behind the cassette.

Is that right?

svetty

Adskis wrote:

....So if I want to use on the 9sp bike, I put the small 1mm spacer behind the cassette
If I want to use on the 10sp bike, I will put the wider 1.85mm spacer behind the cassette.

Is that right?

No. For 9 speed use the 1.85mm spacer, for 10 speed use both spacers - as already posted by DJ58 above........

adskis

Okay, got it. I think.
Thanks.

Semantik

Or if it's a Sram 10 speed cassette (and I believe a 4600 Tiagra cassette too) you don't need the 1mm spacer, just the 1.85mm one.