Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur bikebox Best used with the PRO

Best used with the PRO Carbon Saw

Our diligence was rewarded and we had found the perfect seal grease that every performance oriented shock manufacturer is looking for

Bar Width (Max):800mm

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

Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur bikebox Best used with the PRONow 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