Clamp rack on carbon post
01-31-08, 08:52 AM
#1
Road Runner
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Clamp rack on carbon post
I usually just have an underseat bag on my road bike, but on a tour or an all-day ride I like to take more stuff: outerwear, more tools, snacks or lunch, etc. For this I've been using one of those Topeak racks (with a trunk bag) that has a quick-release clamp around the seat tube. It's nice because I can use it mainly on my off-road bike as well.
Anyway, my next road bike will probably be a higher-end model and they all come with carbon posts these days. Would one of these clamp-on racks be safe to use on a carbon post? If it comes to it, I'd just get a regular steel post instead (not that much of a weight-weenie), but I was wondering if the carbon posts come with any warnings about that type of clamp and loading.
Anyway, my next road bike will probably be a higher-end model and they all come with carbon posts these days. Would one of these clamp-on racks be safe to use on a carbon post? If it comes to it, I'd just get a regular steel post instead (not that much of a weight-weenie), but I was wondering if the carbon posts come with any warnings about that type of clamp and loading.
01-31-08, 09:23 AM
#2
Pwnerer
01-31-08, 10:40 AM
#3
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Topeak gives this warning on their seatpost racks
"MTX BeamRack is not suitable or intended to be used with carbon fiber seatposts."
Edit: That is the warning from the MTX PDF.. similar warnings are on the others.
"MTX BeamRack is not suitable or intended to be used with carbon fiber seatposts."
Edit: That is the warning from the MTX PDF.. similar warnings are on the others.
Last edited by evblazer; 01-31-08 at 11:25 AM.
01-31-08, 11:21 AM
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When you buy the bike I'd have the LBS swap out the carbon post for a good quality Al like a Thompson. If you are buying a high end bike that should be a low or no cost exchange and solves your problem.
A couple of years ago I built up a Litespeed frame with a Campy Chorus 10-speed build kit and exchanged the Chorus carbon seat post for a Thompson at a negligable cost difference. Carbon is a wonderful material but I'm not convinced seatposts are one if its better applications.
A couple of years ago I built up a Litespeed frame with a Campy Chorus 10-speed build kit and exchanged the Chorus carbon seat post for a Thompson at a negligable cost difference. Carbon is a wonderful material but I'm not convinced seatposts are one if its better applications.
