This Powerstop Z17 pad/rotor rear kit has less than 10k on it. Why the grooves on the rotor surface? Pics of both sides.
Last edited:
Rotor grooves, why?
- Thread starter LeakySeals
- Start date
Less than 10 K was supposed to be. Changed. It’s had one winter. I’m semi retired so vehicle only gets about 8K a year. Yes parked outside. I try to keep it clean and I do spray salt away in the winter
Ah ok. To me that's normal. Splash on some of our salty water in winter, and it will get rust. Our cars get parked both in and outside, and I think indoors is worse, but they both suffer greatly. To me, it's just not surprising to need rotors every 5 years, although I have nothing against using records for rotors--it's just more braking surface.
Rotor surface rusted, pad wore unevenly scraping off the rust, now there is an uneven surface on both.
Pads cause this. I see similar effect running Brembo ceramic pads in the back but no issues at all with Bosch CQ in the front, both ends had new Bosch rotors installed along with pads.
So that means the grooves will even out as the pads wear down?
No. They will most likely stay grooved for the rest of the pad life.
That's how my brakes looked when I bought my Jetta. Sat for a long time. 13k miles later they look like this:
Yea, OE Toyota is gentle on rotors but I’ve seen some aftermarket cause this.
I have Duralast Elite on the Sienna, which I believe is a rebrand of Bosch QuietCast. You reminded me to check the rotors. I’ve been BrakeBest Select(made in India by MAT, same as Duralast Gold and Carquest Gold/Platinum) groove rotors.
Normal salt and sanded roads wear pattern. Wait until a rock gets caught in one of the pads grooves and puts a big scar in the rotor.
Normal and a sign of a car sitting more than it’s driven. Also the drives must be fairly low speeds and easy on brakes, otherwise these grooves would’ve been removed.
Perhaps make a conscious choice to brake harder when you’re driving around? It will help scraping the rust off.
Perhaps make a conscious choice to brake harder when you’re driving around? It will help scraping the rust off.
I think winter driving with light brake applications in a snow zone is a big factor. I've noticed ugly looking rear rotors around town during the winter being a BITGO person IE not enough braking force to clean them up.
Similar threads
