I think you mean the downtube. This is almost always because an impact has bent the forks. A bike shop might be willing to cold set [1] steel forks - or not - and forks of any other material should definitely be replaced.
[1] a fancy word for "bend" used to not sound like they're just going to hoik away.
no subject
Date: 2005-09-19 04:20 pm (UTC)[1] a fancy word for "bend" used to not sound like they're just going to hoik away.