Shift/Brake Combinations

- Re-designed, compact hood shape wth improved ergonomics - Adjustable reach - Shorter lever throw than previous Tiagra shifters - Compatible with Tiagra 4700 and GRX RX400 components, but not with previous generation 10-speed groups (105 5700, Tiagra 4600, etc.)

The Shimano GRX Di2 Dual Control Lever delivers light and responsive shifting for mixed-terrain riding. The ergonomic shifter design improves comfort, and the textured, anti-slip brake lever increases control on bumpy terrain. The Di2 version offers the digital precision of Shimano synchronized electronic shifting. - Excellent heat dissipation - Flat mount and anti-mud specification - Convenient tool access - Simple wheel replacement - Easy and clean bleeding system - Never hesitate to tackle rough surfaces - Simple set up and maintenance - Raised hood head prevents hand misalignment and slippage - Recessed finger notch prevents upward slipping - Anti-slip texture and brake lever coating - Improved braking input performance - Higher brake lever axis and curved brake lever - Improved grip and confidence on choppy surfaces and descents - Higher braking efficiency reduces fatigue on long rides

Shimano Ultegra ST-R8150 levers combine the accuracy of Shimano 12-speed Di2 shifting with the light weight of rim brakes. - Quick and intuitive shifting - Clearly defined click feeling with ergonomic shifting lever - Better bike control and confidence in race conditions - Hood shape and texture optimize grip and brake power transmission

- Optical gear display - Adjustable reach - 2-Finger lever, compatible with linear-pull and mechanical disc brakes - Includes OT-SIS41 derailleur cable and housing set