Noise when squeezing carbon downtube

Discuss light weight issues concerning road bikes & parts.
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Alexandrumarian
Posts: 398
Joined: Mon Mar 28, 2016 6:34 pm
Location: Romania

by Alexandrumarian

It is a massive, thin (flexy) walled carbon downtube (mtb). I can hear a sandy rasping noise (not too loud but it is there) when squeezing it, almost over the entire lentgh, both top/bottom and sides. The bike is fairly new and no abuse. I tend to suspect it is a sloppy construction inside, perhaps bladder leftovers rather than some massive delamination. Still, curious to hear other guesses...

by Weenie


TobinHatesYou
Posts: 3777
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

Stop squeezing it. “Doctor, doctor, it hurts when I do this.”

Alexandrumarian
Posts: 398
Joined: Mon Mar 28, 2016 6:34 pm
Location: Romania

by Alexandrumarian

Yeah :) Well found another at the LBS and it does it too, so its the construction.

wallstbear
Posts: 11
Joined: Sun Jun 17, 2018 4:17 am

by wallstbear

Bike strength is tested through several industry standard tests (wont go into too much detail, but they are all relatively similar), and none of them involve squeezing down tubes.

Alexandrumarian
Posts: 398
Joined: Mon Mar 28, 2016 6:34 pm
Location: Romania

by Alexandrumarian

I was cleaning some stubborn mud and heard the noise when pressing on it - wasn't testing for strentgh. Couldn't help not to get slighly alarmed.

AJS914
Posts: 3339
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

What brand frame?

by Weenie


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