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rotor spacers
but opens up on big bumps and descents
1 motor doubles your pedaling power
soothing vibration patterns that are scientifically proven to help you fall asleep faster
Additional taurine to improve exercise performance and reduce exercise induced muscle damage
SHIMANO ULTEGRA Di2 Hydraulic Disc Brake Dual Control Lever Side:Left rotor spacersRoad riding has never been this much fun. That's because the redesigned ULTEGRA ST R8170 DUAL CONTROL LEVERS have all new ergonomics, even more precise brake modulation, and wireless electronic shifting. This trifecta lets you focus on the next sprint, the next descent, or the next joke from your riding partner. Shimano's new ULTEGRA ST R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO WAVE
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