Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur bikebox Bar Width (Max):800mm

Bar Width (Max):800mm

One serving contains 40 grams of carbohydrates (500 ml)

the Dura-Ace cassette achieves an exceptional balance of low weight

Bearings - Triple-sealed Cartridge & Needle

Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur bikebox Bar Width (Max):800mmNow simplified with a single derailleur cage length, the Shimano Ultegra RD R8150 Di2 12 Speed Rear Derailleur packs Shimano's fastest, most precise shifting into a more approachable option. The single cage length is compatible with up to 34T low sprockets, making it more versatile than ever. Specifications Fastest ever rear shifting 58% faster than RD R9150 Compact design includes an integrated wireless unit, charger and switch LED status indicator