Ultegra Di2 RD-R8150 Rear Derailleur Groupsets Compatibility: 41 Pressfit shells -

Compatibility: 41 Pressfit shells - Eg

Goodbye range anxiety

Comes with 'RingFix' quick release system that fits seatpost diameters 25

Build Confidence

while the 55mm chain line offers maximum frame compatibility

Ultegra Di2 RD-R8150 Rear Derailleur Groupsets Compatibility: 41 Pressfit shells -SHIMANO ULTEGRA Di2 Rear derailleur SHIMANO SHADOW RD 2x12 speed 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 sprockets. Our