The simpler, yet defining difference is the broader tyre clearance of the modern tyre.. Updated finish to match new SRAM RED eTap AXST . AeroLink arm amplifies braking power while reducing frontal area . Lighter, aero pad retainers carry SwissStop Flash Pro pads standard . Aero design extends to the shape of the indexed four-position quick release . Wider clearance for modern tires and wheelsets (up to 28c) Specs . Brake Type: Mechanical . Pad Type: Cartridge . Nut Length: 10mm, 16mm . Reach: Standard . Compatibility - Cable Pull: Cantilever/Road . Colour: Grey . Orientation: Front, Rear . Hardware: Stainless Steel