I have an ultegra 10 speed on my trainer wheel. I couldn't be bothered to put the spacer in and now I really need to be careful of shifting too far to the right - the chain goes off into the gap. Fine on the trainer; would be a bit reluctant on the road.
I'm no mechanic but you'd probably know as above if the spacer was really required.
No, in my case it's the other side of the cassette; the gap between the cassette and the chain/seat stays.10 speed cassette is slightly wider and by not placing the spacer the derailer is forced very close and sometimes in to the spokes when shifting in to the low ratios. The spacer is to stop this from happening.
My EA70s did, but that was a few years ago; new models might just be provided with 10-speed freehubs. If you don't have the info in a manual etc, surest way to check is as above, to mount the cassette without a spacer, and if the sprockets are still loose after tightening down the lockring, then you need the spacer, otherwise you're fine.Do Easton`s require a spacer too?
I think you're right. I had no spacer with my new DA cassette or spacer with my new wheels.Spacers are wheel specific, rather than cassette specific, are they not?
By that, I mean the spacer will have come with the wheelset (if you bought a wheelset), rather than the cassette.
As usual, when it comes to these things, I am often wrong however, but that has been my experience with road bikes thus far...