sshock4
04-13-03, 07:24 PM
How does one true a brake rotor. My idiot friend droppd my wheel on a railing and he bent it. Any tips on how to flatten it out without crazy machinery?
Bicycle Mechanics - Trueing Brake Rotors
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Spoke Wrench
04-13-03, 07:35 PM
If you can't ride it the way that it is, you have nothing to lose. Worst case is you'll have to buy a new one. The good news is, if it's not bent too badly, you can usually true it up with your hands. Stand behind the bike and spin the wheel to see where the bend is. Grab the bent section with your hand and try to bend it back. Good luck.
deliriou5
04-13-03, 07:50 PM
ack that stinks....
if it were a car you could get the rotors turned (on a lathe)
but this is a bike.... with tiny, thin rotors.....
that's one of the things that i don't like about disc brakes on bikes.....
if it were a car you could get the rotors turned (on a lathe)
but this is a bike.... with tiny, thin rotors.....
that's one of the things that i don't like about disc brakes on bikes.....
jester69
04-14-03, 09:09 AM
Originally posted by deliriou5
if it were a car you could get the rotors turned (on a lathe)
Even on a car replacement is the only option for warped rotors as if they are warped enough to cause a problem you couldn't turn them down enough to flatten it and still keep in spec.
On a car (and probably a bike) the main symptom of a warped rotor is pulsing brakes, i/e when you hold the brake on it brakes mroe-less-more-less-more-less in rythm increasing and decreasing with speed.
So, if your brakes aren't pulsating when you brake the rotor may well be fine, any worse than that and the only advice I could give would be to replace.
take care,
Jester
if it were a car you could get the rotors turned (on a lathe)
Even on a car replacement is the only option for warped rotors as if they are warped enough to cause a problem you couldn't turn them down enough to flatten it and still keep in spec.
On a car (and probably a bike) the main symptom of a warped rotor is pulsing brakes, i/e when you hold the brake on it brakes mroe-less-more-less-more-less in rythm increasing and decreasing with speed.
So, if your brakes aren't pulsating when you brake the rotor may well be fine, any worse than that and the only advice I could give would be to replace.
take care,
Jester
a2psyklnut
04-15-03, 07:51 AM
How badly bent is it? If it's just a little warped, you can true it straight using a variety of different methods. Mine is to use a rubber handled cresent wrench and tuck the end under the "fins" and using leverage to gently bend the rotor "true".
If it got mashed too much, you're done! Go get a new one!
L8R
If it got mashed too much, you're done! Go get a new one!
L8R