Shimano Ultegra Di2 RD-R8050-SS Rear Derailleur 11 Speed Short Cage Black group-3dplus our patented FIT4 closed cartridge

our patented FIT4 closed cartridge system provides three on-the-fly compression damping positions—Open

a self-cleaning design and selectable release angle with a enduro-style pedal body for extra stability

Gates Carbon Belt Drive CDX SL 9-Spline Rear Cog 28T Shimano Alloy Black

which uses Polartec’s extraordinary Alpha insulation

and increased coverage for the ears

Shimano Ultegra Di2 RD-R8050-SS Rear Derailleur 11 Speed Short Cage Black group-3dplus our patented FIT4 closed cartridgeThe Shimano Ultegra R8050 11 speed rear derailleur focuses on stress free operation in order to provide all day riding comfort with braking and shifting. 11 25T to 11 30T