zx108

a thomson post is at $25 on ebay and closes in 1 hour.

but i dont know the post diameter of my current seatpost. it is a crap kona post that came with the bike. anyone know how i can find the diameter?

some fast resposnses would be great!

mx_599

you should be able to measure across with a metric ruler and estimate to the 10th of a mm

zx108

it measured an inch across and that is 25 some mm and the post was 27 some mm

crap.

zx108

actually i just converted inches to to mm and it was the right size

i just missed out on a perfectly good thomson post for 25 bucks. arrrrrrg

mtb-chop

This guy was parting out a 2005 Stumpy S-Works...there's still some stuff out there ending within the next couple of days...

mx_599

1 inch = 25.4mm

according to what you wrote above, you didn't miss out on anything. was your seat post 25.4 and the one he was selling 27 or not?

mtb-chop

If it's the action I think it is, then it was a 30.9mm layback post.

Edit: It wasn't. This is the one I was thinking of. It's at $25 right now. This guy has a ton of stuff up for auction right now, but nothing I'm interested in.

zx108

i was all confused before. i was deciding to bid on the thomson and bidding on a stem at the same time. and i lost the stem in the last seconds

i used a calc. and it converted 1 inch to mm and it was 25 and i converted 27mm to inches and it was 1 inch. . . the one i wanted to buy was 27mm

thanks for the tip mtb, i am not looking for a setback though. there is one or two posts that have a day or so left, il see what they are doing tommorow

mx_599

27mm to an inch was a bad calculation. whatever you were using, try to find something more accurate. 1.6mm is very significant

Svr

The post diameter is usually stamped on it somewhere. Look carefully.

There's too much of a chance of making a measuring error unless you're using a caliper. A measuring tape just won't cut it.