Arced ergonomic shift travel. Easier shifting conserves energy. Quicker, more efficient shifts. 5mm smaller grip circumference. Better shift lever access. Fits most hands. Model Number ST7801 Series DURAACE Optical Gear Display yes Cassette Compatibility 10speed Front Shifting double FLIGHT DECK Compatible yes FLIGHT DECK Gear Sensor SMSC70 Bracket Material engineering composite Lever Material aluminum anodized Shift