SHIMANO 105 R7120 Shift Brake Lever 12 Speed Right Rear Vest PaceStar: fast rolling cross country compound Size: 24 43mm 70mm PV PaceStar: fast rolling cross country compound with easy rolling base layer Designed with added Flat Protection and a smart inverted tread pattern the Serfas Drifter provides high performance handling and speed on road while boasting impressive versatility and grip off road on dirt and gravel That’s combined with the all condition confidence of hydraulic disc brakes and the quick and intuitive shifting cyclists expect from SHIMANO 105 The SHIMANO 105 R7120 DUAL CONTROL LEVERS feature a revised lever position and bracket shape developed using data from a broad study of different hand shapes