I just got a new frame, which has a large seat tube, so I will need a new seatpost, but I'm not sure how to tell which size will work best. I think it's 30.9 or 31.6, but I really can't tell with a ruler. Is there another way to tell?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.