TRP-42 Disc Brake Rotor High Heat Dissipation The rotors on your mountain bike are important. They are designed to keep the heat down so you can brake with confidence. The TRP-42 Disc Brake Rotor is a 2-piece slotted 6-bolt thick disc rotor that is designed for use with select TRP DHR and E-MTB brakes only. They offer high heat dissipation due to the aluminum center as well as excellent stiffness to provide confidence in your braking. Features2. 3mm thickness offers a lower temperature under braking and a 50% reduction in rotor warping/deformation compared to a standard rotor Six recessed slots create channels to allow water, mud, and other debris trapped between the pad and rotor to escape during braking Lightweight 2-piece design with stainless steel rotor and alloy carrier SPECIFICATIONSDiameter180mm, 203mm Material Steel & Aluminum Intended Use DHR and E-MTB Only Weight180mm: 211g, 203mm: 242g | Trp | -42 Disc Brake Rotor 180Mm 6-Bolt 2. 3Mm Thick Silver/black