What Is Prime - 9?PhilosophyPrime 9 Technology™ is a counter-intuitive philosophy based on the less is more theory. It embraces range without adding complexity. The outcome is fewer parts, reduced weight, and increased durability.Why Not 12?9 Is FineAs a newcomer to the drivetrain market, we didn’t see the need to follow convention. Adding range doesn’t require the addition of gears. Why not enjoy the range of a 12 speed with 9.Why Is 9 Fine ?DurableLess aggressive chainline vs. a 12-speed system. Be prepared for less system wear and tear.SimpleAll those clicks add up. Spend less time shifting and more time in the right gear.LightFewer cogs on the cassette reduce system weight. ShiftersFeatures:• Prime 9TM Technology• Die Cast Top Shell• Extruded Clamp• Fast Action Release Lever• 2 pc Pull Lever / Up to 3 Gears Per ShiftSpecifications:• Matte Onyx Finish• Glass Fiber / Nylon Composite, Steel, Aluminium• Hardened Aluminium Steel Hardware• Limited Lifetime Warranty• 138g Rear DerailleurFeatures:• Prime 9TM Technology• Tri-Pack™ Limited Slip Clutch• Forged Inner and Outer Cage• Pivot-Tech™ Cable Stay• Precision Sealed Bushing Pulleys• Durable 3D Forged LinkagesSpecifications:• Matte Onyx Finish• Glass Fiber / Nylon Composite, Steel, Aluminium• Hardened Aluminium Steel Hardware• Limited Lifetime Warranty• 290g CassetteFeatures:• Prime 9TM Technology• Our Most Durable Cassette• Ultra-Wide Ratio with Consistent Progression• Standard Freehub Body (HG)• Cogs Pinned to Lightweight SpidersSpecifications:• ED Black Finish• Hardened Aluminium Steel, Aluminium• 11, 13, 15, 18, 22, 28, 34, 42, 50• 650g ChainFeatures:• Prime 9TM Technology• Durable Hardened Solid Pins• Compatible with Modern Wide/Narrow ChainringsSpecifications:• Nickel Plated Protection• Hardened Aluminium Steel• 126 Links• 350g