2017 rear brake wear
02-07-2020, 03:41 PM
#1
2017 rear brake wear
So I Have a 2017 991.2 911 2wd. Just in for 10k mike service. Tires are wearing great and are still 50% and wearing even front to back. Front brake pads are at 11mm. Tears are at 4mm.
with even wearing tires, why would rears need needing new pads when from are essentially new. Car was purchased new. Don’t drive hard. Dealer says it’s accelaeration and traction control. But if that was the case the rear tires should be worn much more than front from acceleration. They want an arm and leg for rear rotors and pads. Since it’s sow low mileage I am thinking pads only.
any bthoughts as to what could be going on?
with even wearing tires, why would rears need needing new pads when from are essentially new. Car was purchased new. Don’t drive hard. Dealer says it’s accelaeration and traction control. But if that was the case the rear tires should be worn much more than front from acceleration. They want an arm and leg for rear rotors and pads. Since it’s sow low mileage I am thinking pads only.
any bthoughts as to what could be going on?
02-07-2020, 08:08 PM
#2
Drifting
So I Have a 2017 991.2 911 2wd. Just in for 10k mike service. Tires are wearing great and are still 50% and wearing even front to back. Front brake pads are at 11mm. Tears are at 4mm.
with even wearing tires, why would rears need needing new pads when from are essentially new. Car was purchased new. Don’t drive hard. Dealer says it’s accelaeration and traction control. But if that was the case the rear tires should be worn much more than front from acceleration. They want an arm and leg for rear rotors and pads. Since it’s sow low mileage I am thinking pads only.
any bthoughts as to what could be going on?
with even wearing tires, why would rears need needing new pads when from are essentially new. Car was purchased new. Don’t drive hard. Dealer says it’s accelaeration and traction control. But if that was the case the rear tires should be worn much more than front from acceleration. They want an arm and leg for rear rotors and pads. Since it’s sow low mileage I am thinking pads only.
any bthoughts as to what could be going on?
02-07-2020, 08:17 PM
#3
Found this link, might be of interest ref rear brake wear. I dunno whether it's true or not.
https://www.knowyourparts.com/techni...-and-bearings/
"Another factor that has accelerated brake wear (especially rear brake wear) in certain late model vehicles is the change to electronic brake proportioning. The proportioning valve that normally reduces hydraulic pressure to the rear brakes has been eliminated so the rear brakes will handle a higher percentage of the brake load and be more aggressive. The antilock brake system performs the job of brake proportioning by keeping an eye on how the rear brakes are behaving. If the rear brakes start to lock up when braking hard, the ABS system kicks in and cycles pressure to the rear wheels to prevent them from skidding.
This approach helps the vehicle stop in a shorter distance, but also increases rear brake wear dramatically. This means the rear brakes will often wear out before the front brakes."
https://www.knowyourparts.com/techni...-and-bearings/
"Another factor that has accelerated brake wear (especially rear brake wear) in certain late model vehicles is the change to electronic brake proportioning. The proportioning valve that normally reduces hydraulic pressure to the rear brakes has been eliminated so the rear brakes will handle a higher percentage of the brake load and be more aggressive. The antilock brake system performs the job of brake proportioning by keeping an eye on how the rear brakes are behaving. If the rear brakes start to lock up when braking hard, the ABS system kicks in and cycles pressure to the rear wheels to prevent them from skidding.
This approach helps the vehicle stop in a shorter distance, but also increases rear brake wear dramatically. This means the rear brakes will often wear out before the front brakes."
02-08-2020, 12:03 PM
#5
I will add one more comment before the thread is moved. If you track and or autocross the car, or even spiritedly drive it frequently with Porsche Stability Management ON you will use more rear brakes. That system (PSM) is designed to apply some rear braking when the computer senses the rear end is losing control as in the lateral "G" forces are above what it is programed as normal driving