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Performance vs non-perforamce brakes

Performance vs non-perforamce brakes

Was trying to look and see what the difference in brake disc sizes was between the performance and other models and the manual says:
Front (non-Performance): 12.6"/320 mm

Front (Performance): 13.98"/355 mm

Rear (non-Performance): 13.2"/335 mm

Rear (Performance): 13.2”/335 mm

Does that mean that
1) the rear brakes and callipers are the same on all cars?
2) the front brakes on the non-perforamce are smaller than the rear brakes?!

Any info on how many pistons per caliper each version has as well please?

JAD | 2019年9月17日

1. No, the rear brakes and completely different on performance

2. The mass is what is important, not diameter. Fronts are much bigger on all cars.

Completely different brake system. Performance brakes are too big and heavy for street use, only advantage is heavy track use with more mass to dissipate heat and strength to resist flex at the limit.

rajan900 | 2019年9月17日

2) I thought that the fronts were bigger on all cars but the above says otherwise. Queried with Tesla and was told they are correct...

Performance brakes can't be too big or heavy for street use as they are on all the performance cars which are everyday cars...

JAD | 2019年9月17日

Rear disks tend to be very thin, like I said, diameter is only one measure, front brakes always have a bigger mass as they do 70-80% of the braking and need the additional heat sink ability.

The performance brakes are not so big they are undrivable, just not as good for the street as the standard brakes are more than adequate for street use without the disadvantages of greater un-sprung mass, thus less range and higher cost. For street use, the car is BETTER without the performance brakes.