Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur SRAM Stick the strip down on

Stick the strip down on one side in the middle

For cyclists seeking the ultimate puncture protection

It's fully adjustable to allow you to easily optimize for and switch between standing

Black urban/commuter tread

Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur SRAM Stick the strip down onSHIMANO ULTEGRA Di2 Rear derailleur SHIMANO SHADOW RD 2x12 speed RD R8150 Now 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