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IS PRIME 9 SIMPLER? Same Range with Fewer GearsEase of Set-UpWide CompatibilityLess MaintenanceDon't Worry, All Bike Shops Are Familiar With 9 Speed Platforms! IS PRIME 9 MORE DURABLE? Straighter Chain-lineUnique 9 Speed ChainSingle Shift Option (E-MTB)Fewer Gears (fewer shifts)Full Steel Cassette (all tiers) DOES PRIME 9 PERFORM BETTER? Shifting Less Means Faster RidingOptimized Shift RampsConsistent Gear JumpsLightweight Cassette This groupset includes Box Two Prime 9 Multi Shifter Our Most Durable ShifterLightweight Hinged & Extruded ClampResponsive 2 Piece Pull LeverMTB Style Release Lever (V2) Box Two Prime 9 Derailleur Our Most Durable DerailleurFor Aggressive TerrainTri-Pack Limited Slip ClutchSealed Bushings Pulleys Box Two Prime 9 Cassette Our Most Durable CassetteSteel Stamped CogsLightweight Alloy SpidersUltra-Wide Ratio with Consistent Progression Box Two Prime 9 Chain Our Most Durable ChainDurable Hardened Solid PinsIncludes Nickel Connecting LinkExtra Long for Long Wheel Base & Cargo Bikes Prime 9 Groupset Comparison Chart Box Two Prime 9 Add to Cart Box One/Two Prime 9 Add to Cart Box Three Prime 9 Add to Cart Box Four 8 Speed Add to Cart Customer Reviews 4.1 out of 5 stars 9 3.8 out of 5 stars 8 4.3 out of 5 stars 76 4.6 out of 5 stars 35 Price $140.00$140.00 $147.70$147.70 $89.99$89.99 $134.45$134.45 Rating Our Most Durable Groupset Our Best Performing Groupset Our Best All-Rounder Groupset Our 8 is Enough Groupset Terrain For Aggressive Terrain For Aggressive Terrain For Light/Medium Terrain For Light/Medium Terrain Chainring Compatibility Wide/Narrow Wide/Narrow Wide/Narrow Wide/Narrow 8 Speed Specific Hub Compatibility Standard HG Standard HG Standard HG Standard HG Derailleur Clutch Tri-Pack Limited Slip Clutch Adjustable Tri-Pack Limited Limited Slip Clutch Limited Slip Clutch
✅INCLUDED COMPONENTS Maximize your biking adventure with the Box Two Prime 9 Series - the complete powerhouse drivetrain. Included are Box Two Prime 9 Single Shift Shifter, Box Two Prime 9 X-Wide Rear Derailleur, Box Two Prime 9 12-50T E-Bike Cassette, Box Two Prime 9 126L Chain Nickel, and Box One Shift Cable & Housing Kit.
✅SHIFTER Experience flawless gear transitions with our Box Two Prime 9 Single Shift Bicycle Shifter. Equipped with the Box One Slick Coated Inner Cable, each swing delivers a swift and precise shift. Hinged and extruded clamp, 2 pc pull lever, and die-cast top shell for ultimate durability.
✅REAR DERAILLEUR Tame aggressive terrains with our Prime 9 Speed Derailleur. Tri-pack limited slip clutch, sealed bushings pulleys, and nylon composite knuckle ensure toughness. 3D forged linkages, forged inner and outer cage provide unmatched strength. Compatible with traditional derailleur hangers.
✅CASSETTE Optimize your E-Bike performance with our Box Two Prime 9 Speed Cassette. E-Bike optimized 12-tooth cassette, steel stamped cogs, and lightweight alloy spiders for agility. Ultra-wide ratio with consistent progression and ED black protection for style.
✅CHAIN Wrap your drivetrain in the armor of our Box Two Prime 9 126L Bicycle Chain Nickel. Nickel-plated for ultimate protection, with a nickel connecting link. Durable hardened solid pins, wide/narrow compatibility. Extra-long option available for long-wheelbase and cargo bikes.
