Bent mech hanger alloy frame.

[1552]

Received a frame today but unfortunately the rear mech hanger is bent slightly in 2 directions.

In towards the other drop out.
Towards the bottom bracket so closing up the drop out hole slightly.

Its a non replaceable hanger and is aluminum.

If it was steel I would not be so concerned, but being aluminium it worries me.

Is it likely fixable by a frame shop or decent bike shop do we think?

 

[ishaw]

DIY. A threaded hub axle typically fits. Screw a flat washer either side and slowly bolt down to flatter, or use as a guide and manipulate the axle. All very slow and gentle. You should be able to widen the gap with the same approach.

Did I say slow, gently and incremental gains.

As long as you are careful you should be fine.

 

[d8mok]

I’ve realigned many like that using the proper tool.

I’m not sure it would hold up to another impact once bent back though.

What frame?

 

[1552]

I've done a fair few steel frames but obviously ally reacts differently, so I expect it would be a safer option to get a bike shop pro to do it.

Its a carbon / alloy Stork.

 

[Splatter Paint]

Worth a read:

7

Thread 'Bent aluminum hanger. Help please!'

May 15, 2024

I'm at the end of my build and today I tried to dial in my index shifting. The bike struggled to drop from 2nd highest to highest (smallest) cog.
I changed both shifter and derailleur but exactly the same problem occurred. Then I noticed the hanger (dropout? - unsure of correct terminology) looks bent.

I'm reluctant to use the 'two adjustable wrenches' method as the bike is aluminum and bonded and I fear my heavy hand may do more damage than good.

Can anyone point me in the direction of a shop/frame specialist that may be able to help? I'm London based, so the closer the better as...

• 79stef
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• Forum: Retro MTB Chat