Shimano Ultegra Di2 ST-R8170 12 Speed Shifter + Flat Mount Caliper Size:Rear Brake - Left Hand The round shape of the

The round shape of the SCRATCH M5 allows the pelvis to rotate naturally

Dual locking Presta/Schrader nozzle

Hydrophobic & Oleophobic lens treatment repels water

Hardened bolts hold securely and make chain replacement easy

When dealing with cassettes it is all a game of numbers and the Campagnolo 11 series has them all…a wide range of gearing keeps allows you to dial in the drivetrain to the course ahead

Shimano Ultegra Di2 ST-R8170 12 Speed Shifter + Flat Mount Caliper Size:Rear Brake - Left Hand The round shape of theRoad riding has never been this much fun. The redesigned Shimano Ultegra Di2 ST R8170 12 Speed Shifter and Flat Mount Caliper has all new ergonomics, even more precise brake modulation and wireless electronic shifting, letting you focus on the next sprint, the next descent, or the next joke from your riding partner. Shimano's ULTEGRA ST R8170 brake levers bring enhanced modulation and control to every ride using Shimano's proven SERVO WAVE technology.