Shimano Ultegra RD-R8150F Di2 Rear Derailleur - 12-Speed Medium Cage Includes TL-EW300 BLK MFPN=FD40107-10 The strong outer blocks provide

The strong outer blocks provide the rider with safety at all times when cornering

Zinc-plated 1/2" diameter threaded rod

Split glass-reinforced polyamide crown race

Intended Use = Fat Bike

Stainless Steel Hitch Lock

Shimano Ultegra RD-R8150F Di2 Rear Derailleur - 12-Speed Medium Cage Includes TL-EW300 BLK MFPN=FD40107-10 The strong outer blocks provideShimano Ultegra RD R8150F Di2 Rear Derailleur 12 Speed Medium Cage Includes TL EW300 Black. With the fast and accurate Di2 shifting technology the Shimano 12 speed Ultegra RD R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11 28 11 30 and 11 34 cassettes. Compact design includes an integrated wireless unit charger switch Wider range capacity Max. low sprocket 34t LED status indicator Battery indicator