Based on BRAKING off road world championships experience, the new asymmetric non round design for weight optimisation and mud cleaning performance. Outer and inner diameter of the disk have a non-round design that enables better radial expansion of the rotor under extreme heat conditions. Moreover piercing holes are replaced by edges specifically designed to grow brake pad regeneration process. Feature: More braking grip, less weight and high heat dissipation. Benefits: highly reactive, better handling and stable power at all conditions. Torx screws with special Loctite that is included in the packaging. For Cross country, All mountain and Enduro. Outer diameter: 140 mm. Note: When used with Shimano center lock applications, W-FIX rotors can only and exclusively be used with Braking Center Lock adapter (CK0001). Weight: 80.3 g.