The Girodisc system is a direct replacement for the OE disc; no modifications are necessary. The disc will bolt directly to the car and work perfectly with OE calipers. By upgrading your brakes with lightweight, high-performance replacements as opposed to a big brake kit, your factory bias and ABS efficiency are maintained. The Girodisc rear rotors are approximately 8.8 lbs. vs. 10.7 lbs. for the stock units. This rotational and unsprung weight reduction allows for quicker acceleration and suspension response.

The central hat section of our rotor is made from strictly U.S.-sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in-house at Girodisc. The rotor utilizes a curved vane design developed in racing to act as a centrifugal pump to force cooling air through the disc.

The rotor and hat have a floating mount system, which utilizes ten high-strength alloy steel drive pins manufactured by Girodisc in the USA to our own specifications and cadmium plated for long-lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. To keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side, which allow the rotor to grow with heat expansion while eliminating the rattle and noise associated with floating rotors. This float also allows the rotor to self-center between the pads.

Once the Girodisc system is in place, simply replace the cast iron rotor when needed.  


8.8 lbs per Side
6061 Aluminum Construction

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