Originally Posted by
jacobsever
Might be a stupid question, but when buying an after-market seat collar, do you want to get the exact size as your seat post? Or slightly bigger?
Because the Cinelli Vigorelli uses a 31.6 seat post, yet the Phil Wood seat collars come in 31.8. Is that the one I would need for it? Or do they just not make one for that size?
Think about that for a second. If a 31.8 fit, that would mean the tubing wall is only .2mm thick, which is about as thin as a sheet of paper.
You need a 35mm seatpost clamp for that frame (or as some manufacturers call it, 34.9mm).