Hayes D-Series Rotor DMZ The redesigned Shimano Ultegra Di2

The redesigned Shimano Ultegra Di2 ST-R8170 12 Speed Shifter and Flat Mount Caliper has all-new ergonomics

the same as all of the most recent fizik models

aero efficiency rapidly tapers off and the additional weight quickly begins to neutralize the marginal aero gains that the deeper rim provides

29% elastane

When weight and storage in your pocket or saddlebag is important for you

Hayes D-Series Rotor DMZ The redesigned Shimano Ultegra Di2Developed to work specifically with our Dominion platform, the D Series rotor offers superior braking performance without any annoying howls or vibrations. Features MRC (Modal Resonance Cancelation) cancels out noise and vibration via FEA optimized modal shapes cut into the rotor1. 95 mm material thickness enhances heat dissipationQuickBite provides the shortest path to high performance through fast and consistent burnishing Mfr Claimed Weight TBC