Sort of OT: I'm on a Cdale Evo which I had the stem slammed. Then I switched to a different stem which was a little taller where it clamps to the steering tube. I was in a very gentle crash, basically laid the bike over and when it was checked out, the steering tube was cracked. I am not sure if the crash caused the damage or if it was caused by tightening the stem onto a steering tube that was essentially a few mm too short.
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tetonrider: I have never heard of those sleeves; is that a diy type of thing or can they be purchased?