Brembo GT/21” AMG III installed on R63
21x9 ET60 275/40 21 Proxes Sport SUV with 10mm spacers
Last edited by rbtmak; Apr 7, 2020 at 10:51 PM.
The stock brakes are actually quite large at 390mm front and 365mm rear.
Brembo brakes are slightly larger but save about 20 lbs in unsprung weight at each corner over stock. The stock calipers are much heavier.
With 80 lb shaved in total, the car feels quicker off the line and rides better.
Last edited by rbtmak; Apr 11, 2020 at 11:14 AM.
The stock brakes are actually quite large at 390mm front and 365mm rear.
Brembo brakes are slightly larger but save about 20 lbs in unsprung weight at each corner over stock. The stock calipers are much heavier.
With 80 lb shaved in total, the car feels quicker off the line and rides better.
The stock 20x8.5 ET60 fit over the Brembo brakes but the front calipers just touch the inner spokes.
The solution is to use 10mm H&R spacers all around which I was doing already to bring the wheels flush to the fenders.
The 21x9 ET60 will clear the Brembo calipers without the use of spacers due to their extra width.
Can’t believe there is that much mass up front!! Great results!!
I’m keeping the stock brakes as a complete set should someone want to buy them, so not going to part them out at this time.
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[size=13px]GT SYSTEM[/size]
Front
DynamicsStreetTrackRace Caliper
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405mm
34mm
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Rear

StreetTrackRace 4-Piston
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28mm
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