The Tektro TR-45 center-lock disc brake rotor features a 2.3mm thickness for improved stiffness and high heat resistance. These rotors are crafted with stainless-steel to provide durability and corrosion resistance. 2.3mm thickness for improved stiffness and high heat resistance (Please ensure that your caliper is designed to accommodate the 2.3mm thickness) Crafted with stainless-steel to provide durability and corrosion resistance Steel center-lock mount type Lock-ring sold separately