Newbie Rotor Question

[old///MFanatic]

Hey all,
I have the StopTech ST40 355x32 rotors (and calipers) on my car (front and back).
The rotors have warped. What are my options for replacing them / do I need to use 2 piece floating rotors?
Looking for affordable options.
Thanks.

https://centricparts.com/getmedia/bd...c-8-2018_1.pdf
#1

[Obioban]

Yep, almost certainly pad deposits.

Easiest way to clean them off is put some track pads on for a couple of days, run at street temps (cold).

Then go back to street pads, as they'll eat your rotors very quickly if run cold for an extended period.

Stoptech "sport" pads? Those things are the most deposit prone pads I've ever run. I got deposits on my hard driven M5, and my mom got deposits, on her 65 year old driven e46 awd automatic wagon.

Rotor warping pretty much never happens.

[r4dr]

How did you conclude that the rotors are warped? Felt pad judder is usually variance in pad material deposited on the rotor surface.

Suggest you check the hub is clean and the rotor properly mounted. Satisfying that - then fully bed the brakes.

^ This is accurate. I would suspect pad smearing is what happened. 100 grit sand paper will do wonders for clearing some of that off.

[Estoril]

How did you conclude that the rotors are warped? Felt pad judder is usually variance in pad material deposited on the rotor surface.

Suggest you check the hub is clean and the rotor properly mounted. Satisfying that - then fully bed the brakes.

[Advorsor]

Hey all,

I have the StopTech ST40 355x32 rotors (and calipers) on my car (front and back).

The rotors have warped. What are my options for replacing them / do I need to use 2 piece floating rotors?

Looking for affordable options.

Thanks.