I should have mentioned how I broke it. Usually I tighten it with an allen key on my multi-tool. There's not much leverage there, so I usually get some stiff resistance and I know it's tight enough. The other night, though, I used a long Park Tools L-wrench from the bike co-op I volunteer at. I was able to keep tightening and tightening and then it just snapped and the seat post slid down all the way. I wasn't used to an allen wrench with that much leverage. Anyways, the collar is trashed...the bolt is stuck and there's no way to get it out. We tried getting it out but it's done.


Just to be clear: I broke the bolt because I used a more powerful allen wrench. The seat post collar is a stock Surly Stainless steel clamp that is fitted correctly to the seat-post. I'm just looking for recommendations now for a strong, good-looking 30.0mm collar.