The TRP R1 2.3mm 1-piece 6-bolt thick rotor is designed specifically for DHR and E-MTB brakes only. For DHR and E-MTB only 2.3mm thickness provides 47% increased torsional stiffness and 8% better cooling capacity Design reduces vibrations and increases stiffness and power Rotor wear indicators Includes 6 stainless steel bolts Features a clear "Rust Blocker" treatment on arms to help prevent corrosion Specifications Hub/Disc Compatibility6-Bolt DiscPad CompatibilityAll Pad CompoundsRotor Size (mm)220Rotor TypeOne Piece