Ultegra RX RD-R8150 Di2 12 Spd. Pump Accessory and feel to your game

and feel to your game

Face: Composite

Density: 35

and height

Made with bio-renewable material waterproof to 1 meter (when inserted in mount) for all-conditions reliability (IP67 Rated)

Ultegra RX RD-R8150 Di2 12 Spd. Pump Accessory and feel to your gameNow 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