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Power Glass™ solar charging extends battery life up to 42 minutes per hour in battery saver mode
quiet shifting: Optimized design reduces friction and noise
SyncDrive motor technology smooths out bumps along the ride
The Park Tool PS-1 Disc Brake Pad Spreader is a must-have tool for any mechanic working with hydraulic disc brakes
seamlessly blending advanced technology
Shimano RD-R8150 Ultegra Di2 12-Speed Rear Derailleur trinity Power Glass™ solar charging extendsNow 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.