Shimano Shimano GRX ST-RX815 2 x 11-Speed Di2 Left Drop-Bar Shifter/Hydr - The Shimano GRX ST-RX815 11-speed Di2 shift/brake lever integrates electronic shifting with improved grip and confidence on chippy surfaces and descents. A raised hood head prevents hand misalignment and slippage, while a recessed finger notch prevents upward slippingAnti-slip texture and brake lever coatingHigher brake lever axis and curved lever allow for higher braking efficiency to reduce fatigue on long ridesTooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferences