Girodisc Rotor and Pad Review
Thread Starter
Senior Member
Joined: Jan 2014
Posts: 251
Likes: 48
From: Kalispell, MT
2016 E63 S AMG
Update: the rear Girodisc rotors each weigh 8 lbs less the the stock rears. The rears cost more than the fronts due to the forged aluminum hat being machined to accommodate the parking brakes. I now have several thousand very hard miles on the Girodiscs and can state unequivocally that these rotors are superior in every way to the stock rotors. Another nice touch on these is that the iron rotor portion is zinc galvanized which prevents rust from forming on the edge and in the cooling channels. My rears had a significant patina of rust on the inside of the cooling channels and the car is only eight months old.
Last edited by BerndV; Nov 19, 2016 at 06:25 PM.
MBWorld Fanatic!
Joined: May 2016
Posts: 1,370
Likes: 40
CLS63 AMG
I have been experiencing a progressively worsening high speed, high heat braking shudder that MB refused to warranty. They used my vehicle modifications as a pretext for refusing the warranty claim. However, I wasn't overly pissed off because I wanted to install lighter rotors anyway. I ordered Girodisc rotors and the Girodisc SS pads for the front axle of my E63. The Girodisc front rotors are 7 lbs lighter than the stock iron rotors and, unlike the stock units, are full floating. I am very impressed with the quality of these rotors compared to stock. The SS pads have more bite and are supposed to be able to withstand much higher temperatures. I am experiencing no squealing or noise that often accompanies higher performance pads, but they do generate a bit more dust than the stock pads. Now that I have tried the fronts and found them to be superior to stock in every way, I am ordering a set for the rears as well. I purchased for 12% off retail which seems to be the best deal available on the Girodisc products. The install is extremely easy for those of you who are DIY'ers. You will lose the factory electronic wear sensor with these pads. Girodisc also makes a very nice caliper spreader that I highly recommend as well.
Thread Starter
Senior Member
Joined: Jan 2014
Posts: 251
Likes: 48
From: Kalispell, MT
2016 E63 S AMG
The caliper spreader is for DIY pad replacements. It is extremely well designed and made. It is used for pushing the caliper pistons back into the caliper body so that the new pads will clear the disc.
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Joined: May 2016
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CLS63 AMG
Senior Member
Joined: Jul 2016
Posts: 390
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From: Queens,New York
E63s
I heard some really good reviews of Racing brake , they also make an oversized rotor kit with caliper bracket and avail carbon ceramic discs to fit stock red calipers , also heard there street.pad is low dust , the kit I'm looking at is $2200 for front ,rear rotor sets with pads braided lines and fluid , they are full floating rotors and you keep your e brake
MBWorld Fanatic!
Joined: May 2016
Posts: 1,370
Likes: 40
CLS63 AMG
I heard some really good reviews of Racing brake , they also make an oversized rotor kit with caliper bracket and avail carbon ceramic discs to fit stock red calipers , also heard there street.pad is low dust , the kit I'm looking at is $2200 for front ,rear rotor sets with pads braided lines and fluid , they are full floating rotors and you keep your e brake
For me its down to either girodisc or regular size RB. RB likely performs better but I like that girodisc is still a bit lighter and cheaper as well.
Former Vendor of MBWorld
Joined: Aug 2008
Posts: 1,127
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CLS550
An aluminum hat can be easily scored (if you forget to release the parking brake), or destroyed (if you use it as an emergency brake, on street or track).
This is why the OE rear two piece rotors the hat are made of Cast Iron (like GTR), or Stainless Steel (like CCB rotors for Porsche, Ferrari, or Corvette ZR1) in order to maintain the parking/emergency brake integrity.
We believe the correct light weight rear rotor hat should be made like our composite hat with aluminum shell + iron sleeve insert (see pic below). We are proud to be the first and still is the only brake company offers this true high performance rear light weight feature.
I now have several thousand very hard miles on the Girodiscs and can state unequivocally that these rotors are superior in every way to the stock rotors. Another nice touch on these is that the iron rotor portion is zinc galvanized which prevents rust from forming on the edge and in the cooling channels. My rears had a significant patina of rust on the inside of the cooling channels and the car is only eight months old.
This process adds uniform coat of anti-corrosive paint over the "Entire" casting surface including the corner/crevices of internal cooling vanes, which conventional plating can not reach.
We have recently improved this coating to cover the whole disc (including disc surface where pads are in contact), where after a few initial break-in stops the paint will disappear and leave all other area protected against rusting/corrosion.
An environmental friendly and effective corrosion protection process that we are proud to implement to our brake discs.
https://www.racingbrake.com/SearchResults.asp?Cat=7112
BEFORE:
AFTER:
Innovative design w/o compromising the safety and OE integrity is what you can expect from RB brakes.
Do more research, ask questions to your prospective suppliers/mfgrs so at least you know what you are paying for, which shall help you make a better decision.
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Former Vendor of MBWorld
Joined: Aug 2008
Posts: 1,127
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CLS550
Above rotor installation is for a Corvette ZR1 CCM converting to Iron Rotor for track racing. For those interested to learn more can click below.
RB light weight steel rotors option for CCM
http://www.corvetteforum.com/forums/...post1587691191
RB light weight steel rotors option for CCM
http://www.corvetteforum.com/forums/...post1587691191
