Four Prime 9 Derailleur(8spd), Wide Cage - Black

- Prime 9 Technology for less derailleur travel and better chainline. Less wear and improved lifespan\n- Box One features: Adjustable Tri-Pack limited slip clutch, forged inner and outer cage, Pivot-Tech cable stay, sealed bearing pulleys and 3D forged linkages\n- Box Two features: Tri-Pack limited slip clutch, forged inner and outer cage, Pivot-Tech cable stay, sealed bushing pulleys and 3D forged linkages\n- Box Three features: Limited Slip Clutch, stamped front/rear cage, direct channel cable stay and bearing pulleys\n- Box Four features: 8 speed with Prime 9 technology and the same construction as Box Three\n- Limited Lifetime Warranty\n- 3rd party web sales must be an Authorized Dealer