Bicycle 160mm Rotor MTB Bike Disc Brake Rotor For 6 Bolt Dirt Hybrid Size: 160mm Material: Martensitic mechanics steel Thickness: 1.8mm,more wear-resistant Weight: 98g(160mm),approx Opposite hole distance 44mm,standard size Hub/Brake Compatibility: 6-Bolt Disc Suitable for Avid, Shimano and Hayes disc brake Suitable for both front and rear application Package includes X1 160mm brake rotors