Clarks lightweight finned floating rotor is constructed from the highest grade materials , offering superb braking characteristics regardless of conditions.- 7075 Grade alloy carrier offers superb heat resistant characteristics reducing the chances of rotor warp during pro-longed braking- 5 Cooling fins Quickly dissipate heat 40% more effectively than a standard rotor, away from the braking band eradicating brake fade.- 420CR Steel braking band offers a superb quality surface to get the very best brake performance from your system regardless of conditionsSpecifications:- Compatibility: Electric Bikes, MTB, Road, Hybrid- Diameter: 160mm- Weight: 100g