bent chainring tooth Sram Red - advice please

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bent chainring tooth Sram Red - advice please

Postby schroeds » Tue Oct 30, 2012 9:09 pm

Had a rather unfortunate meeting with a traffic calming device the other day...which put me in hospital :evil:

Nothing broken, but lots of lost skin (including flattened out nose and chin) and suspect shoulder that the physio will have to deal with.

Anyway, among the carnage is a pretty severely bent chainring tooth. Has anybody any tips/experience with bending them back? Though I may as well give it a whirl before forking out for a new one which I can't afford.

PS kudos to Zipps, my old 404 hit this stupid concrete thing at about 30 km, plenty enough to piledrive me into the asphalt, but the wheel appears not to have been damaged at all :)
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by BNA » Tue Oct 30, 2012 9:24 pm

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Re: bent chainring tooth Sram Red - advice please

Postby Mulger bill » Tue Oct 30, 2012 9:24 pm

Start with prayer to your deity or prophet of choice... :|

A shifting spanner makes a handy tool but hasten slowly, you won't get many chances to get it straight.
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Re: bent chainring tooth Sram Red - advice please

Postby schroeds » Wed Oct 31, 2012 12:10 am

ok so it's a highly technical process then :shock:
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Re: bent chainring tooth Sram Red - advice please

Postby Baalzamon » Wed Oct 31, 2012 12:34 am

Hasten too fast and thy teeth will break
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Re: bent chainring tooth Sram Red - advice please

Postby bychosis » Wed Oct 31, 2012 7:02 am

And there is no harm in trying to unbend most things that are broken. Worst that can happen is that you can't straighten it and needed a new one anyway.
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Re: bent chainring tooth Sram Red - advice please

Postby schroeds » Wed Oct 31, 2012 8:45 am

well ok then, pep talks over, here I go

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Re: bent chainring tooth Sram Red - advice please

Postby lump_a_charcoal » Wed Oct 31, 2012 9:34 am

Well? :D
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Re: bent chainring tooth Sram Red - advice please

Postby eeksll » Wed Oct 31, 2012 11:25 am

if its only one or a couple and my mtb is anything to go by, you should be riding fine without that tooth anyways.
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Re: bent chainring tooth Sram Red - advice please

Postby rustychisel » Wed Oct 31, 2012 11:32 am

main thing is that you're not broken. I was lead into a nest of those things by another rider at 45kmh a few years ago. Front wheel Ksyrium was undamaged but I got off the ground with a broken collar bone.
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Re: bent chainring tooth Sram Red - advice please

Postby jacks1071 » Wed Oct 31, 2012 11:33 am

schroeds wrote:Had a rather unfortunate meeting with a traffic calming device the other day...which put me in hospital :evil:

Nothing broken, but lots of lost skin (including flattened out nose and chin) and suspect shoulder that the physio will have to deal with.

Anyway, among the carnage is a pretty severely bent chainring tooth. Has anybody any tips/experience with bending them back? Though I may as well give it a whirl before forking out for a new one which I can't afford.

PS kudos to Zipps, my old 404 hit this stupid concrete thing at about 30 km, plenty enough to piledrive me into the asphalt, but the wheel appears not to have been damaged at all :)


I straightened one out on the kids bikes a week ago. I zip tied a screw driver to the frame as a rough gauge and worked it with a shifter - it took about an hour but I got it surprisingly quite straight.

If you do the same you might need some small files to tidy up some of the mashed teeth but you might be able to salvage it. If you have a crack at it you'll soon know if a new ring is required..
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Re: bent chainring tooth Sram Red - advice please

Postby schroeds » Wed Oct 31, 2012 11:59 am

lump_a_charcoal wrote:Well? :D



Still trying to open the tool box. :shock:
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Re: bent chainring tooth Sram Red - advice please

Postby schroeds » Sat Nov 03, 2012 4:10 pm

Good news, I've managed to straighten the teeth..actually it was really easy, basic plier work 101

Thanks for the encouragement guys :D Now I just have to heal and get back on the bike.
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