i am almost done with my bike all i need to do is shank a seat post up my bike's ass but i have problem
the seat tube is oval! 26.4 suppose to fit in there but it doesn't neither 26.2 and i tried 25.4 it fit!... but the problem is i have to tight down the seat tube really hard and i am afraid im gonna damage the seat tube.... what do you think i should do? should i just go with 25.4 or maybe file down the tube? SOS!