Quieter than ever, but with superb, consistent braking performance on any long, steep descents thanks to excellent heat dissipation. The new arm shape is more robust, leading to quieter operation Featuring ICE TECHNOLOGIES and FREEZA; ICE TECHNOLOGIES is a proprietary fabrication technique consisting of a 3-layer aluminum and stainless-steel structure allowing for superior cooling. FREEZA are aluminum/stainless fins that support rapid heat dissipation. Combined you get longer pad life, less brake fade and substantially quieter braking Recommended both for road or mountain bike braking systems Lock-ring included Attributes Disc Diameter 160mm Disc Material Stainless Steel/Aluminum Disc Pad Type Metal or Resin Disc Rotor Weight 114g Disc Technology Ice-Tech and Freeza Hardware Yes Hub Compatibility Center Lock