3mm Rear Brake Rotor for Razor MX500, MX650, and SX500 Electric Dirt Bike
- This is the 3mm thick front brake rotor for newer models. Older models use a 2mm thick brake rotor.
- Compatible with our BRK-500R-3M disc brake caliper.
Older versions have 2mm thick brake rotors and newer versions have 3mm thick brake rotors. A 5 cent nickel is approximately 2mm thick and can be used to determine the rotor's thickness as shown below.