Cassette spacer needed?

[johnjo]

I've been overhauling and renewing some parts of my bike in preparation for a ride from London to Paris in July and found your site after referring to Sheldon Brown for some touring tips. My current problem for which I can't find a specific answer is as follows. I bought a pair of wheels with a freehub on the rear and separately bought a 7 speed SRAM PG730 cassette. Having installed the main body and the single additional smallest sprocket I find that with the lockring installed and tightened there is still a gap where the outer end of the freehub body is visible. I haven't left any bits in the box and my thoughts are that a spacer is required either inboard or outboard of the cassette. Can any body help?

[johnjo]

Hi,
Me again. I went to my local bike shop this morning and the guy gave me a hard plastic spacer free of charge which I have now fitted and everything seems fine. So if anybody else has or will encounter the same problem the answer is yes you can put a spacer inboard of the cassette to ensure it fits snugly.

[Bill]

(06-05-2010, 08:03 AM)johnjo Wrote:  Hi,
Me again. I went to my local bike shop this morning and the guy gave me a hard plastic spacer free of charge which I have now fitted and everything seems fine. So if anybody else has or will encounter the same problem the answer is yes you can put a spacer inboard of the cassette to ensure it fits snugly.

Thanks for the info john and welcome to the forums.

[cyclerUK]

Yes the 7 speed cassettes need an extra spacer when fitting them on current freehubs.
More or less all new Shimano freehubs takes 7,8,9 and 10 speed cassettes.
7 speed needs a spacer (3mm).
8 & 9 fit straight off.
10 speed also needs a thin spacer but not sure of the thickness.