Shimano Ultegra ST-8150 Di2 Dual Control Shift/Brake Lever Rim Brakes - Left 2x BLK ModelNumber=J2621 With independent High and Low

With independent High and Low Speed Compression adjustments

However the true highlight is the lightweight and low-profile Solix SL hub and spoke configuration

(2) compression nuts

Chainguide Mount Type ISCG-05 Material Composite Max Tooth (teeth) 36 Color Black Weight 105 Bashguard No Defined Color Black Tooth Range 32-36T Backplate Material Aluminum

Color Red Pedal Type Dual Sided Clipless with Platform Pedal Spindle 9/16" Pedal Body Material Aluminum Spindle Material Chromoly Defined Color Red

Shimano Ultegra ST-8150 Di2 Dual Control Shift/Brake Lever Rim Brakes - Left 2x BLK ModelNumber=J2621 With independent High and LowShimano 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 Brake Lever Actuation Short Pull Super SLR Double or Triple Double Color Black Includes Brake No Drivetrain Speeds 12 Front