VincentBul

Hello everyone.
I am about to buy a GT4 equipped with ceramic brakes.
I wondered if it was normal that the rear pads were more worn than the front?
What would be the cause?
traction control?
Based on your experiences, what is the average lifespan of a set of pads?
This for try to judge the use of the car.
Thank you for your return

venom51

The rear brakes are used as part of the torque vectoring mechanism.

VincentBul

what kind of conclusions can we make about the driver with this kind of wear

orthojoe

Lol! That the car is thankful for stability control, otherwise the prior driver would have balled up the car a long time ago. There really is no excuse for rear brakes getting toasted before the front other than driver incompetence and hamfisted horrible driving on the track.

Rears last on average 2x longer than front pads.
That being said, prior driver competence shouldn't preclude from buying the car as long as it wasn't crashed

VincentBul

Thanks the reflexion i had 😉.

The surprising thing is that thé car has 12000kms .
It's the first tires on it and are 70% worn .
Front pads are ok ans rear pads are 50% worn

lovetoturn

VincentBul

he said it's the original pads.
I have all the history of the car from the dealership. the history confirms that the pads have never been replaced

benben01

Hopefully the excessively worn rear pads are not a result of doing burn outs or attempted burn outs...

Viperguy324

Do they start out with the same thickness in pads, front to back?

zedcat

Approx same, I measured a set of OEMs at 11mm front and 12mm rear- for the friction material excluding the backing plate.

4carl

Backing plates are 5mm =16&17mm total thickness new.carl

VincentBul

I have no info about the oem's pads.
In Pagid it's 16,6mm Front and 17,0mm Rear.

Earlierapex

We've had a lot of discussion on this on GT3 forum. Conclusion is that there is electronic interference in the rear - possibly from the emergency brake. It's not wear, it's a false signal. If you pull the rotor off the hub, you get a completely different metal content measure in the PCCB rotor.

VincentBul

Here is what i found on the Pistonhead's forum:

For those of you with PCCB brakes on your GT4.......

1) After washing the car, give a quick dab on the brakes as they don't work straightaway
2) Check them regularly for signs of chips, cracks and de-lamination
3) Make sure you use the provided long bolts (when removing the wheels from your car) that ensure the wheel will not drop or touch the carbon discs
4) Check the rear brake pads often and replace at 50% worn (the rear brakes are used as a stty replacement for a decent LSD)
5) If tracking the car, turn off traction control as it will overheat the discs (see point 4 above)
6) Look into getting some rear brake cooling ducts to mitigate points 4 and 5 (I have the cooling ducts from the GT3 RS on mine)