Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
My Mavics came with a 1mm spacer for 10speed cassettes. If you don't have one, I bet your LBS could scrounge one up for you. (Especially if you show up with baked goods or malted beverages.)