Post-Mount Disc Brake Adaptor (40mm) Vendor_BikeSmart this X-Horizon rear derailleur shifts

this X-Horizon rear derailleur shifts faster

Removable/replaceable hardshell front knee cap to reduce snagging

Double X-durability KMC chains are put through a heat treatment process twice to maximize strength so the chain lasts longer and goes farther

Defined Color: Silver

and power cable are universal between Dura-Ace 7970 and Ultegra 6770 Di2 systems (later Di2 systems are not compatible)

Post-Mount Disc Brake Adaptor (40mm) Vendor_BikeSmart this X-Horizon rear derailleur shiftsDisc Brake Adaptors Includes stainless steel bolts Brake Caliper Type: Post Mount Mount Rotor Size: 160 Post 200 Rotor, 140 Post 180 Rotor, 180 220 Rotor