Rotor Description: Brand:ZOOM Material: Stainless steel Size: 140mm,160mm,180mm,203mm Opposite hole distance 44mm Thickness: 1.85-1.9mm Package included: 1*rotor+6*bolts Color: As picture shows Suitable for long-distance long-term use, and stable performance. Utilizing the cross-drilling technology, the lightweight system ensures heat dissipation when used at high strength.Easy to Mount on your Disc Brake Ready Frame and Fork.Excellent heat dissipation, Ideal for Shimano Alivio/Deore Disc Brake Systems.