Make sure you get the right thickness (Sorry- I don't have the specs). I used a "regular" spacer I had used on other wheels and it was just a little too thin for the Zipp which caused a slightly loose cog fit when the lock ring was tightened. This caused a loud clank every time I hit a crack or bump in the road. The thickness difference is only 1 or 2 millimeters but it is vital. LBS had a selection of sizes.

Thanks for the heads up, I'll be sure to double check that.

You don't specifically need a Zipp sapcer... cheap as can be.

http://www.ebay.com/...?hash=item2a512d7d7f

Are these spacer legit? lol. Any problems with them?

LOL... It's a SPACER...

How non-legit could they be??