The rotors have mounting studs molded into them. You can really see the matrix of carbon and ceramic that the rotors are made up of here. Notice that the roots of the rotor vents are smaller than your typical iron parts.
In this picture, you can see the remnants of the original carbon fiber layup.
The outer part of the vents is bigger but still smaller than your typical iron rotor. Note how thick the rotor is. This is to help make up for the lack of thermal mass.
The rear rotors measure out at 390mm x 32mm, up from the stock 380mm by 30mm. Like the front, the rear brakes have a wider annulus for more swept area as well as a bigger diameter.
Since the parking brake on the GT-R is contained within the rear rotor hat, the hat on the CCM rotors is machined out of lightweight steel instead of aluminum as it must do double duty as the parking brake drum. It is nickel plated for corrosion resistance. The rear rotor also floats on large bobbins for maximum free movement.
Like the front, the rotor studs are molded into the CCM material.
11 comments
As always, great content. Thanks for all the info on parts I can only dream of having. I feel I can’t even afford to read the article. (I’m one of your IG followers and long time SCC subscriber)
I personally don’t think they are cost-effective but they sure are cool!
did you guys weigh the rotors? kinda curious about the actual weight difference over just the generic 30% lighter…
Yes on the last page, we saved 40.4 lbs over the OEM brake system.
With such a difference in rotor diameter and a greater difference front vs rear, does the brake bias change at all? 40lbs of rotating and unsprung mass saved is crazy. Makes the price seem realistic if you’re chasing the absolute best feeling possible.
No, it doesn’t change, it’s factory-engineered.
I had always been told that larger rotors on a street car are actually detrimental, since it takes longer for them to reach optimal temperature for good braking. Does the same apply to carbon ceramic rotors?
That’s not true at all. Bigger brakes allow you to run streetable less aggressive pads on the track. Race pads will literally eat rotors on the street in a few hundred miles. Big brakes allow true dual-purpose use. More brake power is typically also easier to modulate.
Just out of curiosity, can you recommend any places to source these on the used Japanese market like you guys did?
I used google to find a set and had a Japanese friend ship them to me.
There’s a website called, Croooober.com, that you might want to check out.