Ultegra RX RD-R8150 Di2 12 Spd. Rear It delivers precise and consistent

It delivers precise and consistent shifting performance across a wide range of MTB conditions

and is great for diving into fast corners

fits all e-Tube Di2 groups

Tool for improving stroke

YONEX original rough braided fibre and a special nylon coating provide maximum bite on the shuttle for enhanced hairpin net shots and cuts

Ultegra RX RD-R8150 Di2 12 Spd. Rear It delivers precise and consistentNow 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. Our fastest ever rear shifting, 58% faster than RD R9150 Compact design