Originally Posted by venga!
Hiya, I just got a seatpost that ended up being .2mm smaller than what I should've got. I don't really want to go through the trouble of returning it as it was special ordered and I'd have to wait all over again. Is a .2 millimeter a big difference? Is it OK just to keep riding on the post, or will it do some kind of damage or something?
The reason seatposts are made in .2 mm increments is because it does make a difference. You need the right size. As mentioned in other posts, using an undersized post could ruin your seat tube.