Campagnolo's AFS rotors, which are compatible with perfectly rounded outer profiles, not only dissipate heat safely and evenly but also guarantee optimal performance even under heavy loads that can impair the functionality of competing products. Two available sizes: Campagnolo ensures top performance with 160 mm rotors. A 140 mm rotor is permitted on the rear wheel if the rider's weight does not exceed 82 kg. High heat resistance: The rotor is designed to have high heat resistance, allowing the rider to descend safely. The inner aluminum spider enables optimal heat dissipation, ensuring that the hub continues to operate at normal temperatures. • Material specifications: Steel • Mounting system: Center Lock.