Oh no! Damaged my bike.

drawis

Dirt Disciple
Oh dear. Riding along the other day (miles from anywhere, naturally) and somehow, whilst changing gear- I can't work out what precisely happened- the rear derailleur sheared in two. I was going pretty slowly, nothing got caught up in the wheels or anything and the chain didn't slip off the cassette either into the spokes or down beyond the small cog. Maybe the mech itself was just weak?

Anyhow, its definitely broken. The chain broke too. Clearly I need a new rear mech.

I am concerned about the frame though. The dropouts still seem to be aligned properly, the rear wheel still rotates fine, but the bit to which the rear mech is bolted on looks to me to be bent out of true. Or is it? I can't recall exactly what it was like before. I attach some pics. Should the entire structure be aligned in one plane or is there supposed to be a slight kink here?

Bike is an Orange C16r.

If it is bent, is this repairable simply by bending it back? The metal looks pretty solid and there is no cracking of the paintwork.

Is this the area where on a modern bike a rear hanger would be used, avoiding precisely this sort of thing?

Lots of questions I know but I also know that you folk are full of answers!
 

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It is bent then?

The tyre is some weird hybrid one I got with the bike- its supposed to be slick in the middle- quite good on road as a result.
 
Bent hanger, snapped mech and snapped chain?
Somethings definately got jammed/caught all three wouldn't have happened from just riding along!

Possibly the mech snapped first got caught and caused the rest or the chain bent and snapped and bent and caused the rest.

:)
 
The joys of a steel frame my friend!

Yes it's bent it should be parallel with the wheel, and inline with the rest of the dropout

What I'd do is take the remnants of the dead mech off and then use an adjustable wrench to get it back into shape, no heat required and you can use thin plywood inside the jaws of the wrench if you are worried about paint

Done it a million times (at least) on various dropouts and deraileur hangers

Don't try it on aluminium though :D
 
drawis":1jg2gom9 said:
It is bent then?

The tyre is some weird hybrid one I got with the bike- its supposed to be slick in the middle- quite good on road as a result.

Yes bent. It can easily be bent back if it's a steel frame.

Those style tyres can be quite unpredictable off-road.
 
hydorah":2o2tzqcc said:
The joys of a steel frame my friend!

Yes it's bent it should be parallel with the wheel, and inline with the rest of the dropout

What I'd do is take the remnants of the dead mech off and then use an adjustable wrench to get it back into shape, no heat required and you can use thin plywood inside the jaws of the wrench if you are worried about paint

Done it a million times (at least) on various dropouts and deraileur hangers

Don't try it on aluminium though :D

or he could, y'know, get it done properly. alignment of the mech hanger in multiple directions is important for good shifting
 
hydorah":7ucj4dux said:
What do you think an LBS is gonna do?

Eyeballed alignment is absolutely fine

use a proper derailleur hanger straightening tool.
 
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