I am presently in the middle of building my new read bike and ran into a little problem. I have a Syncros Titanium seat tube that is 27.0 MM. The seat tube dia. is 27.2. (Minimal but I didn't want to take a chance). I ran down to my LBS looking at possible shim options, and they had the part, cost was $8.99. The Mechanic there suggested I save my money, take and cut the ends off a Coke can, and use this as a shim. Through a little trial and error, I came up with a shim that is about 1¼" wide x 3¾" long, and it worked perfectly. My hats off to the Mech. Any one else w/similar 'quick and painless' (to the wallet) fixes out there???