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Mountain Biking - Seatpost issues...

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View Full Version : Seatpost issues...

01-17-09, 09:56 AM

So...I took the 27.2 Tompson off my Komodo and put the GD on. I was gonna put the Tompson on the Crapper, but the one on the Crapper right now is 26.8. Where can I find a shim to make the Tompson fit the Crapper?

Man, I was so pissed when I found out it didn't fit! The OD of the seat tube is 30.0 on both bikes. The Easton wall tubing is just a bit thinner on the seat tube on the new Komodo. Weird.

I guess I'll just have a Thomson "laying around". That sux b/c it was a Christmas gift 2yrs ago from Wifey. GD is still shredding!:mad:

cryptid01

01-17-09, 10:10 AM

negative shim

http://www.framebuilding.com/seat_tube_reamer.gif

01-17-09, 10:17 AM

I wondered if they made those...hmm...now the wheels are turning.

01-17-09, 10:20 AM

http://www.youtube.com/watch?v=-GUWgAPlfnY

kenhill3

01-17-09, 10:50 AM

negative shim

How much material can be safely removed? Ed's gotta reduce the dia. by 0.4mm, so he's gotta remove 0.2mm of material. I think I've seen it done for 27.0 to 27.2.

cryptid01

01-17-09, 12:45 PM

How much material can be safely removed?

By my calculations, "the Crapper" will be 11.24159% less safe than it is right now.

01-17-09, 04:26 PM

That results in a negative number.