Ultegra Di2 RD-R8050 Butterfly Pirelli designed this new tubeless-ready

Pirelli designed this new tubeless-ready tire with the new SmartEVO compound to provide our Professional riders as well as all cycling enthusiasts

CFC's or solvents and is fully biodegradable

Anti-fog | UV sun protection

This one-piece training swimsuit features a medium-cut bust for total coverage and a flexible Swim Tech design to free the back and shoulder blades for total freedom of movement

It's as simple as that

Ultegra Di2 RD-R8050 Butterfly Pirelli designed this new tubeless-readyThe new Ultegra Di2 derailleur now gets all the great design features from Dura Ace. Shimano Shadow Get a wide gear compatibility RD SS covers: 11 25T to 11 30T RD GS covers: 11 28T to 11 34T Maintain race concentration with more intuitive shift control System communication with front derailleur SHIMANO Synchronized Shift Specifications Specifications Manufacturer Warranty 2 years Position Rear Transmission Type Electronic Weight 242g (SS), 249g (GS)