Select Page

Zinn technical FAQ: Sitting on carbon top tube, through-axle security, hill gradients

Zinn technical FAQ: Sitting on carbon top tube, through-axle security, hill gradients

Don’t miss a moment from Paris-Roubaix and Unbound Gravel, to the Giro d’Italia, Tour de France, Vuelta a España, and everything in between when you…

Tuesday, Aug 02

News

Don’t miss a moment from Paris-Roubaix and Unbound Gravel, to the Giro d’Italia, Tour de France, Vuelta a España, and everything in between when you join Outside+ .

Have a question for Lennard? Please email us veloqna@comcast.net to be included in Technical FAQ.

Dear Lennard,

Long time follower/first time writer, so here is my question:

We all know that you never clamp a carbon frame’s tubes in a bike stand clamp, but what is the bike manufacturers’ position with riders sitting on their carbon top tubes?

If you go on your local club ride, stop at the red light, or even watch some riders after a race as they chat away, you’ll find many are sitting their bums on their carbon bikes top tubes….

Inquiring minds would like to know.– John Dear John, That is an excellent question. Indeed, my inquiring mind would like to know as well. So, I put the question out to some carbon frame makers as well as to a couple of companies who repair carbon frames, and I got a wide variety of answers. Turns out, there is not universal agreement that it is okay to sit on your carbon top tube. It’s great that you brought this up. Here is what Chris Cocalis, founder and CEO of Pivot Cycles, has to say about it: “Unless they have something sharp in their pocket that could damage a thin tube, there should be no issue with sitting on the top tube. Highly concentrated pressure is the issue. […]

Share This