Join Date: Aug 2001
Location: upstate New York
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Clincher rims are the most common, and are probably the only rim you are likely to find on the shelf of most bike shops.
A tubular tyre is mounted to a rim that has no 'clinchers' on the side, and it is bonded with mastic to the rim. Tubular rims weigh less than clincher rims, and they ride better, too. However, they are more difficult to repair when punctured, and usually cost more. The term 'sew-up' also refers to tubular tyres.
As far as the shifting problem goes, it sounds like you may have an overly tight cable. Did somebody try adjusting it that didn't know what they were doing?
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