Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur Category_Tools and communicative feel at the

and communicative feel at the limit of cornering

spokes or disc brakes

secure connection between bar and stem

Support to Connect Sensors - No

BRAKES  Promax DSK-330 flat mount

Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur Category_Tools and communicative feel at theSHIMANO 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