Shimano Ultegra Di2 FD-R8150 Rear Derailleur

Now streamlined with a single derailleur cage length, the 12-speed Shimano ULTEGRA R8150 rear derailleur delivers our fastest and most precise shifting yetmaking high-performance cycling more accessible than ever.

Designed for versatility, this next-generation derailleur is compatible with up to 34T low sprockets, ensuring smooth, effortless gear changes across varied terrain.

• Lightning-fast shifting 58% faster than the RD-R9150 for ultimate responsiveness.
• Compact, all-in-one design Integrated wireless unit, charger, and control switch.
• LED status indicator Displays battery life, pairing status, and adjustment mode.
• Expanded gear range Compatible with up to a 34T low sprocket for greater adaptability.