GiroDisc Slotted Rear Rotors for the GR Corolla 2023+

These GiroDisc 2-piece rotors are replacement for the Toyota GR Corolla and GR Yaris. The GiroDisc rotors are larger than the factory discs, and include the necessary caliper spacers and longer caliper bolts to reposition the caliper. No other modifications are necessary. Weighing in at 10.4 lbs per rotor, these fully floating assemblies help shed unsprung weight and rotating mass from the rear axle of the vehicle.

The rotor rings are machined from a proprietary casting made of high-carbon iron formulated to GiroDisc’s specifications. This superior metallurgy results in a rotor that lasts longer, and the 48 curved vanes act as a centrifugal pump pulling air in through the hub to effectively cool the rotors under hard use. The 2-piece design means a reusable hat which can be attached to new rings (part number D2-268) when they need to be replaced.

All major components including the hats, rotor rings, and drive pins are manufactured in-house at Girodisc's facility in Bellingham, WA from domestically sourced materials. The hat is made from 6061-T6 aluminum and coated in a black anodize finish. The drive pins are made from a high-strength steel alloy and cadmium-plated for corrosion resistance. All rotors are assembled with spring clips and Belleville washers for race-ready float while also being street-friendly with no noise from loose hardware.

Diameter: 316mm
Thickness: 18mm
Weight: 10.4 lbs per rotor assembly

The minimum thickness at which Girodisc recommends replacing these rings is 16mm. They also recommend replacing them if a crack leads to the edge of the ring.