Surron Rear Brake Rotor by Warp 9This upgraded oversized rotor measures 220mm in diameter and 1. 8mm in thickness, providing enhanced braking force. It is a perfect upgrade for those running bigger or heavier wheels or those with a modified power output, ensuring optimal braking performance. The 1. 8mm, 2 piece design is specifically engineered to address heat cycling, which is a common cause of rotor warping. The two piece construction helps to minimize this issue. Please note that