Cassette Use on Dura Ace7850CL

Mark1962a

I have a set of the new Dura Ace wheels arriving and have two other sets of wheels with 10 speed only Shimano cassetttes - Higher splines.

Is it OK to use those cassettes on the new wheels which have the 9/10 speed freehub and the lower splines - I realise that whilst they will fit, they will not be quite as snug on the splines - is there any implication and does anyone out there run the Shimano 10 speed only cassettes on 9/10 speed hubs. I just want to make sure that I do not damage the freehub on the new wheels.

Otherwise its another £45 on an Ultegra Cassette....

..

John.T

Those cassettes will be fine. The only difference is the depth of the cut away bit. The internal diameter is the same.

dazzawazza

Another question, is the spacer required? I'm thining no.

John.T

Yes it is. The freehub is 9/10sp.

Mark1962a

So do I need to get a spacer before I fit the 10 speed cassette on the 9/10 speed Dura Ace Hub or will it have a spacer on already - I have swapped the cassettes before on my 10 speed only wheels and never noticed a spacer? If so which is the correct spacer to buy? thanks for your help on this Guys

John.T

You do not need the spacer for a 10sp freehub as that is 10sp only and 10sp cassettes are narrower than 9sp ones. For an 8/9/10sp freehub you need the thin spacer that comes with a 10sp cassette. You have not lost them have you.

Mark1962a

Thx John, My old 7801 Dura Ace Wheels (10 speed) came with the cassette fitted as they were from a friend - I bought a 10 speed SRAM cassette a year ago that is on my sons bike but that did not have or need a spacer and is on a set of RS10s with no problem and I used it on some Aksiums for a while

So no spacer it seems -mmmmmm

Hopefully Sigma sport my LBS will have one somewhere

.

flanners1

SJS cycles £1.99!