Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur Brand_iGPSports it works with any bike

it works with any bike frame

4mm) and Large 15" x 1" (375mm x 25

Designed for the sunny weather idealist

positioning all parts of the bike within reach for any mechanic whether seated or standing

Shimano Ultegra RD-R8150 Di2 2x12-Speed Rear Derailleur Brand_iGPSports it works with any bikeSHIMANO 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