Quote:
Originally Posted by pbarry
If it's ovalized, reaming is not the best solution. A proper mandrel might make it more round--Buldogge's recommendation for using a sacrificial steel SP is right on. Find the correct clamp and a slightly undersized post, and all should be good. Use carbon paste if there's slippage...
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It's hard to offer complete advice without knowing what is wrong with the frame, or indeed what size tube and posts are being discussed. I would, however, disagree in general that an undersized post and some goop is the best solution for an oval seat tube. To me this is like a post-accident automobile's bumper fallen cover affixed with duct tape as a solution, in that the underlying damage is the real issue. Something sharp is causing the scratches on the post being inserted. That something should be identified.
cm - DKG was a supplier to Serotta for clamps in the 30mm sizing, if the frame is of the age that I am imagining and used that clamp, and they are still being offered here:
DKG Sizing Page
It is likely, in my experience, that whether the tight fit and scratches are due simply to a past over-tightening of the clamp, perhaps to accommodate a 27.1mm post, then remedied by manipulating the tube above the slot and sweetening the edges of the slot, or whether they are due to the interior surface of a weld such as the seat stays, a reamer may be required to achieve a nice sliding fit.
If you were anywhere nearby, or wanted to ship it, I'd offer to have a look at it and see about fixing it. This is not an un-heard of issue.