Shimano Ultegra ST-R8150 Di2 STI Gear Shift Levers - Pair Tyre Width_1.7 Competition proved tread compound and

Competition proved tread compound and pattern

Fabric Body: Whisperer 10D x 10D Ripstop

Its hidden bolt pattern makes better use of carbon fiber to further improve stiffness and shed weight

Carbon crank arms are lightweight and incredibly stiff

If you own a BoXXer 27

Shimano Ultegra ST-R8150 Di2 STI Gear Shift Levers - Pair Tyre Width_1.7 Competition proved tread compound andShimano Ultegra ST R8150 Di2 STI Gear Shift Levers Pair The ST R8150 electronic shift brake lever from Shimano's Ultegra Di2 road bike group shifts wired 12 speed or 2 speed and brakes mechanically. It scores with fast gear changes, which are defined and intuitive thanks to the Shimano index shifting system. Cables lead from the STI first to a junction box and then to the battery, which in turn is connected to the rear derailleur and front derailleur.