Shimano Steps RT-EM810 Disc Brake Rotor - 180mm Center Lock External Lockring Rear Only with Magnet Bracket. Shimano RT-EM810 disc brake rotors for speed sensor systems deliver powerful and consistent brake performance in all riding conditions. The ICE TECHNOLOGIES FREEZA rotor significantly reduces heat build-up in the brake system to ensure consistent high performance braking even on the steepest downhill stretches.

Recommended brake kit: Shimano M9120/M8120/M7120

1.5mm thickness

Centerlock mounting system makes installing and removing rotors quick and easy thanks to the spine mount and lock ring design.

High heat dissipation by radiator fin