Warped Disk

[J4CKO]

I have a Cannondale Bad Boy Hybrid with Hope Mono Minis on, I noticed the front brakes were binding yesterday on the way home, along with a under inflated rear tyre due to an earlier puncture it was hard going.

I had a look tonight and the disk seems out of shape, took it off and it doesnt sit flat on a flat surface, its kind of gone basket shaped, I fitted new pads which said brake hard and then tip water on, I think this is what has killed it, luckily I have a spare but I am surprised that the manufacturers of the pads (Superstar) recommend this if it can warps disks or is there some other reason ?

 

[RedBike]

I doubt cooling the disc with water caused it to warp - maybe.

Couldn't you just bend it back?

 

[spandex]

+1 take it back

 

[Steve Austin]

Superstar pads are starting to have a very bad reputation, not that his would affect the disc too much.

Just bend it into the right flat shape with the jaws of an adjustable spanner

 

[Mr Pig]

Just bend it into the right flat shape with the jaws of an adjustable spanner

Yes, it's quite easy. Just little bits at a time until it's straight.

Actually, chucking cold water onto a hot brake is a stupid thing to recommend.

 

[jimboalee]

What am I doing on the internet on Xmas day? Waiting for the shower to become vacant!, kids Uh!

Anyway, about this problem.
Many disks on Range Rovers - ( the yanks call them Brake rotors ) are changed due to misshape after the car has been driven hard and braked hard and then been plunged into a river or water splash.

Its like pouring cold water into your frying pan while its still hot! It will never return to shape.

As for getting the rotor changed, I think you're stuffed unless you can prove the pads OEM instructions were detremental and take up the case with them.

Merry Christmas Everyone,,,

Have a goodun.

 

[J4CKO]

Yes, I think the disk is knackered, shame as it isnt very worn, the Suprstar pads do have a variable reputation, but for commuting I just wanted soem more bite and as they are sintered I was hoping this might be the case, the do seem better but in following their instructions I have buggered the disk, I have a spare so will stick that on, it seemed like a bad idea but I just thought as they recommend it, it should be ok and the disks must get pretty hot and wet (oo er missus) during the pounding they get in downhill so a bit of me doing some hard braking on the flat and quenching them as recommended should have been ok. Explains my labourious commute the other night, binfing brakes and a tyre at 30 psi, explains why my legs were aching yesterday !

I suppose I should get a floating disk now, I dont use them that hard in the commute but they just look so damn cool !

 

[RedBike]

I just wanted soem more bite and as they are sintered I was hoping this might be the case

Sintered pads don't have as much bite as resin pads.
In fact in terms of braking performance resin pads should out-perform sintered in just about every way. The reason people buy sintered pads is they last several times longer than resin pads.