Shimano Steps RT-MT800 Rotor With Lockring and Magnet - Ice Tech Freez

RT-MT800 Ice Tech E-bike rotors with built in speed sensor magnet providing consistent braking performance through energy control Uses revolutionary stainless steel / alloy 3-layer sandwich construction that manages heat while riding The clad steel / alloy / steel rotor construction allows heat generated from braking to radiate quickly through the aluminium core achieving surface temperature drops of around 50 deg C. When used with Ice Tech pads surface temperatures can drop from around 400 to 300 deg C, this provides great improvements in performance all round Ice Tech rotors achieve long pad life, less noise and less fade due to improved heat dispersion With internal lockring housing the magnet necessary for speed sensor function on Shimano STEPS equipped E-bikes allowing frame clearance for wider tyres Rotors are durable lightweight and rigid, using the proven Shimano Center Lock system giving increased strength and security with an easy set-up Precision cut and drilled braking surf