Shimano Shimano Ultegra Di2 RD-R8150 Rear Derailleurs Road bike/components/derailleurs & shifters CBF24-20 Extremely lightweight and versatile core

Extremely lightweight and versatile core combined with high impact resistance and maximum pop

Seams at knees to turn into shorts

A broad base provides inherent stability

Includes: 3 x 16 g cartridges & 1 PU grip

External zippered pocket for utensils

Shimano Shimano Ultegra Di2 RD-R8150 Rear Derailleurs Road bike/components/derailleurs & shifters CBF24-20 Extremely lightweight and versatile coreThe ULTEGRA RD R8150 12 speed Di2 electronic rear derailleur integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length shifts cassettes from 11 30 to 11 34 bringing new versatility. Compact SHADOW design includes an integrated wireless unit, charger, switch and LED status indicator. Wider range capacity: compatible with 11 30 and 11 34T 12 speed