Shimano Ultegra R8070 flat mount hydraulic disc brake caliper. - Model Number: BR-R8070 - Brake Type: Hydraulic disc brake - Average Weight: 280 g/pair - Greater rider control in all conditions - Hydraulic disc brake provides the next stage of control - Sleek integration into a road bike&';s aero profile - Designed to integrate seamlessly with a road bike&';s profile - Flat mount hydraulic type - Better heat dispersion than current road disc systems (SM-RT800) - New construction provides better heat management than current ICE TECHNOLOGIES FREEZA