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Bent Disc
#1
Is there a magic method for straightening a brake disc?

I tried the "bend-it-the-opposite-way" method but it's still not quite right.
Is it best to replace?
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#2
"impished" Wrote:Is there a magic method for straightening a brake disc?

I tried the "bend-it-the-opposite-way" method but it's still not quite right.
Is it best to replace?

Best is not to bend it to begin with Tongue

As I understand it, if bend the other way doesn't work then replace is the only real option.
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#3
[quote author=]

Best is not to bend it to begin with Tongue

As I understand it, if bend the other way doesn't work then replace is the only real option.[/quote]

Think I did it changing a tube t'other day.  dropped/threw wheel on ground and heard the disc 'twang'.  Thought nothing of it until I put some oil on the chain yesterday and the wheel stopped spinning almost instantly....


Think I'll stick a spare on, to be safe.
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#4
The bend it the other way method is the only way to do it & will work fine BUT you have to be slow, careful & quite precise.
You can buy tools for the job, but can also use a spanner or needle nose pliers.

It's a bit frustrating as you need to work with small areas & gradually strighten it rather than grabbing the "bent" bit & just tugging on it.
It's also worth remembering that "stright" or "flat" are very accurate terms.  The modifier "enough" is really very useful Wink
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#5
depends how far you've bent it....???
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#6
New superstar rotor : straight, cheap, bit bling.
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#7
There will always be a risk of cracking if you try to bend it back, depends if it's just a little tweek or a proper bend...
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#8
i did fairly well with mine by taking the disc off, putting it on a table top to suss out the wonky bit and applying gentle bending power via the medium of my hands. if you can get it flat on a tabletop then it'll be straight on the bike too.
Keep it foolish...
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