I have the Prodrive/Alcon 330mm brake set up on my classic. Last August/Sept I bought Godspeed Discs to replace the originals which had warped.

All has been fine up until about 2 - 3 months ago I get a hard vibration through the steering when braking at anything over 15mph.

Thanks to having a work van, the car is only driven on weekends so I've covered less than 5000miles on these new discs, before going down the warped discs route and claiming them on warranty is there anything else is could be?

The only other thing I could put it down to would be tracking but surely I would get the vibration at the time or the car would wander if this was the case?

Any ideas people?

 

Hi
As the car is only driven on weekends , it could be rust on the discs behind the bells causing the bells to lift from the disc , enough to make them run untrue.
You could take the bells off the discs and clean them up with WD40 and some fine emery cloth , or send them back to me to do for you , and check them out to make sure they are 100%.
You should also check the calipers , these are buggers for corroding under the pad retaining lugs at the end of each pad , they are the metal plates bolted into the calipers , you can get corrosion under these which pushes the plates off the calipers , which tightens them onto the pads and can make the pads seize in the calipers , this can end up overheating a disc and end up warping it
Cheers Ian
01656 723060