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

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