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- 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