Get a 25 mm seat post, don't get a expesive one get a cheap one with plenty of meat, take it to a machine shop and how ever much you want to bein the frame get them to turn 0.2 mm off of the post. Give it a test ride off. It should not be much of a job it would be a 5 min job with a lathe.
Get a 25 mm seat post, don't get a expesive one get a cheap one with plenty of meat, take it to a machine shop and how ever much you want to bein the frame get them to turn 0.2 mm off of the post. Give it a test ride off. It should not be much of a job it would be a 5 min job with a lathe.