Shimano Ultegra ST-8150 Di2 Dual Control Shift/Brake Lever Rim Brakes - Left 2x BLK ModelNumber=J2621 ChainKMC X12L-1

ChainKMC X12L-1

V-Stays for added stability

90" (184x48mm) 2014-2015 Trek Fuel EX 29" D1

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

Shimano Ultegra ST-8150 Di2 Dual Control Shift/Brake Lever Rim Brakes - Left 2x BLK ModelNumber=J2621 ChainKMC X12L-1Shimano 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