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

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

Shimano's ST-6870 Ultegra Di2 shifters raise the bar for high-speed shifting and unbeatable ergonomics. With a simple push of a button, you get precise, near-instant gear changes. These sculpted beauties greet your hands with a flat transition from the handlebars to the hoods, and the blade design makes it even easier to reach the shift buttons from the hoods or the drops. Easy-to-add satellite shifters (sold separately) can be used for even easier access to the shift buttons from the bar tops or the drops. The use of electronics limit wear and tear on your shifting components, so you'll experience like-new, perfect shifting ride after ride. - for rim brakes - 295 grams (pair)

Shimano R8050 Di2 dual control lever. - More intuitive shifting operation - Updated features and more defined click feeling - Clearer separation between shift buttons support quick and precise shifting while operating with thick gloves - Customizable functionality to match the rider's style - Each switch has the option for multi-shift ON or OFF - E-TUBE PROJECT - Programmable function of ST top button remote switch for third party cycle computer and shifting - More Reach Adjust range - 2x11-speed - Average Weight: 148 grams