2007-03-12 19:44:38 · 5 answers · asked by popeyex44 1 in Sports ➔ Cycling
You "TRUE" a disc rotor by the SPINES coming out from the hub flange to the braking surface.
MAKE ABSOLUTELY SURE YOUR WHEEL IS SEATED CORRECTLY AND YOUR QUICK RELEASE IS AS TIGHT AS YOU CAN GET IT!!!
Shut off the TV and the Radio/MP3 Player.
Simply look through the sight window on your caliper and locate(listen) for the RUB... Take notice of which side is hitting and what SPINE is contributing to the rotor being "Out of True..." Press opositely with your thumb on the SPINE, being carefull to NOT TOUCH any other part of the rotor - do this gently until you get the result you need. This takes a little bit of practice but, once you get it down, it an easy way to wow your friends
Now, another point all together: There are many companies who sell some kind of hokey tool, and they DON'T WORK - they don't even come with directions! These tools actually warp the braking surface in relation to the hub and twist it... BAD!!!
ONLY adjust a rotor by the Spines and not by the rotor's braking surface!
If this is too much for you, the spend the $40 and get a new rotor!
2007-03-13 13:55:18 · answer #1 · answered by bigringtravis 4 · 0⤊ 0⤋
if they are expensive discs, then you should attempt to fix them. you'll need 3 drumsticks, the tool for straightening rotors. they look like spoons with a slit at the end. you'll also need a gauge to measure the trueness of the rotor. once you find the bend, you put a drumstick on each en of the bend, then use the one in the middle to pry the bend in the other direction while still holding the other two drumsticks. because the precision of this procedure, its wise to leave it to a pro bike mechanic so it gets done right.
if this is a cheap rotor, then it might be easier (and cheaper) to buy a new rotor. a decent one will cost around $20. buying in pairs also saves money, and you'll have an extra rotor when yo need it.
good luck
2007-03-13 03:36:24 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Sorry, but you will have to buy new. Unless you have access to heavy engineering, as mentioned above, you are not going to get a flat disc. Replace may be cheeper anyway.
2007-03-13 01:48:58 · answer #3 · answered by Alice S 6 · 0⤊ 0⤋
Heat then put in a heavy tonage press.
2007-03-12 19:48:43 · answer #4 · answered by roger a 3 · 0⤊ 0⤋
just get new ones, youll probably have to anyway
2007-03-13 01:02:34 · answer #5 · answered by Anonymous · 0⤊ 0⤋