Bike Forums - View Single Post - Seat clamp problems! Please help! (2008 Bianchi Pista Concept)
Old 02-09-12, 04:59 PM
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fietsbob 
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+1, my guess its threaded and the threads are stripped,
now you have to get the threads restored.

A machine shop may be able to install a helicoil, essentially a coil
of diamond shaped tempered steel wire.

you could also get a longer bolt and put a nut on the other end.
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