Forums

Bicycle Mechanics - Seat posts and shims

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.

PDA

View Full Version : Seat posts and shims

Richard D

10-01-02, 05:43 AM

I'm thinking of replacing my seatpost - It's at the maximum extension, and I could probably take a few more millimeters.

Only thing is it's a 30.9 which seems to limit my choices - I know I can get shims to take a 27... post up to 30.9 but am I likely to find the post too weak?

RainmanP

10-01-02, 06:54 AM

Richard,
If you just want something basic, Nashbar has a store brand ATB post available in numerous sizes including 30.8 mm. Don't you have a Giant? Suspension seat post? Are you just wanting a fixed post? You can tighten up the clamp at the bottom of the suspension so that it won't move. I have ridden mine that way for some time.
Regards,
Raymond

faith

10-01-02, 06:57 AM

Richard D;

I wouldn't bother with shims, just do it right the first time.

The following link gives you a dozen 30.9mm choices from three vendors.

http://spokesetc.com/site/page.cfm?PageID=28&Category=1406

Spokes Etc. is one of the very best LBS's in Northern VA. When others say "don't know", they have come through. I am humbled by the skill set of their master mechanic, Bill Baker. He is a truly a gentleman and a scholar and recommended the Kalloy Seat Post to me as an excellent replacement for one that I had that was a non-standard size and too short.

toolfreak

10-01-02, 10:39 AM

Richard,

forget shims, its not solid and they sqeek!
The most high end seatposts have 30.9 in their line, spoil some money and buy a nice Easton or a Raceface

:beer:

Richard D

10-01-02, 10:56 AM

Thanks for the advice guys.

I've currently got the standard post which is a functional enough 300mm alloy post, but over the last year I seem to have raised the post by small amounts, getting more and more comfortable and I'm now at the limit, whilst looking at my knees I could probably go 10mm or more higher - so 400mm posts are looking good..

I'm after another layback post (the bikes a medium and I'm a biggish guy) - I liked the look of the TITEC hellbent post with 1.5" layback, but it doesn't come in 30.9, and I don't know of any other manufacturers of more than an inch layback - let me know!

Not really wanting to spend more than £50 as I'm awaiting a fork upgrade in the near future.

Richard