Shimano RD-R8150 Ultegra Di2 12-Speed Rear Derailleur trinity Designed to bring variety and

Designed to bring variety and immersion

and enjoy the seamless feel of Shimano Di2

Power Glass™ solar charging extends battery life up to 42 minutes per hour in battery saver mode

and personalization

quiet shifting: Optimized design reduces friction and noise

Shimano RD-R8150 Ultegra Di2 12-Speed Rear Derailleur trinity Designed to bring variety andNow simplified with a single derailleur cage length, the new 12 speed Shimano ULTEGRA R8150 rear derailleur packs our fastest, most precise shifting into a more approachable option. With our fastest, most accurate shifting, the new 12 speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28 34T low sprockets.