Originally Posted by
maxmonster
So Wednesday I went to the local bike shop to get some parts measured so see what kind of parts I would need. The seat tube diameter is 26.6mm, would I be able to use a 24.4mm seat post?
The sizes you list in the text don't match the sizes you list in the subject. No way a 24.4 mm seatpost would work.
A 26.4 post probably would work in a 26.6 seat tube - 0.2mm differences are pretty common in stem/bar clamp diameters (25.8 bars in a 26.0 clamp)... depends on your seat clamp and maybe frame material, if you've got one lying around it might be worth trying it but I wouldn't buy the wrong size on purpose.