Hello, I'm new to cycling, and I wanted to fix a noise when pedaling with a lot of force.
I brought my bike to a bike workshop, to remove the bottom bracket, and now it seems like a part of the frame is bent. (the noise is now gone btw)
My question is: how bad is this? I can see a part that's bent, with a notch going under the frame. Also, if this is not too bad, how can I actually remove the bottom bracket?
The frame is aluminum from 1979. The cartridge square bottom bracket is 119mm for information.
by Master-Car9378
5 Comments
I have never seen anything like this in my almost 20 years of professional mechanics. It looks like the manufacturer may have put a slit in the bb shell (perhaps for a proprietary bottom bracket or something that mounts between the BB and the shell) but it does also appear the shop may have over torqued the bottom bracket and is causing that deformation.
But as I said, I’ve never seen a bb shell like that before so I may be 100% incorrect. Please, someone else, correct me if I’m wrong
Is it my eyes or does the weld look bad on image 3 & 4? Is it the chainstay connection?
Looks like you are getting a new frame
I’m gonna say that this bottom bracket is going to fail the go/no-go test.
I suspect the cup is threaded in deep enough that it’s beyond whatever damage there is here. You could remove it to look. If so, other than it being a 46 year old aluminum frame subject to metal fatigue, I’d ride it.