CASSETTES & COGS

 Fits Shimano freehub bodies 7mm thick base to prevent damage to alloy freehub under heavy loads Centric teeth allow flipping of cog to double the lifespan Narrow/wide tooth profile helps prevent dropped chains Long lasting durability 16T Narrow/Wide 16T Black 23g

 Fits Shimano freehub bodies 7mm thick base to prevent damage to alloy freehub under heavy loads Centric teeth allow flipping of cog to double the lifespan Narrow/wide tooth profile helps prevent dropped chains Long lasting durability 18T Narrow/Wide 18T Black 24g

 Fits Shimano freehub bodies 7mm thick base to prevent damage to alloy freehub under heavy loads Centric teeth allow flipping of cog to double the lifespan Narrow/wide tooth profile helps prevent dropped chains Long lasting durability 20T Narrow/Wide 20T Black 29g

 CNC 7075 Alloy Replaces one cog of a Shimano cassette for greater range Must be used with medium (1x) or long cage derailleurs (2x) Compatible with SLX*, XT, and XTR 10sp cassettes *SLX cassette only allows replacement of 11T cog and requires special lock ring (#180049) 40T Black 75g

 Prime 9 Technology is a counter-intuitive philosophy based on the less is more theory - it embraces range without adding complexity Compatible with standard HG style freehub bodies Ultra-wide ratio with consistent progression Cold rolled steel and aluminum construction Cogs pinned to lightweight spiders 11-50t 9sp 11-13-16-20-24-30-36-42-50 Black

 Wide range 9 speed cassette made specifically for E-Bike use Less gears allow for a more simple and durable drivetrain to withstand the wear and tear of E-Bike use Compatible with standard Shimano freehubs Cogs pinned to lightweight spider Hardened Alloy Steel 11-50t 9sp 11-13-15-18-22-28-34-42-50 Black

 Made of hi-tensile steel and 7075-T6 aluminum, the Box Two 11-46 cassette helps bring the steepest climbs within reach by providing a massive gear range of 418 percent Two aluminum carriers hold the largest seven cogs while four individual cogs are separated with aluminum spacers Each cog features ramped teeth for improved shifting Box cassettes are compatible with all major 11 speed chains and traditional MTB freehubs Not compatible with XD Drivers 11-46t 11...

 Prime 9 Technology is a counter-intuitive philosophy based on the less is more theory - it embraces range without adding complexity Compatible with standard HG style freehub bodies Ultra-wide ratio with consistent progression Cogs pinned to lightweight spiders 11-50t 9sp 11-13-15-18-22-28-34-42-50 Black

 Tested by the UR/Polygon Team on the World Cup circuit, Box DH Cassette Spacers are a simple and cost-effective solution for your drivetrain needs CNC-machined from 6061-T6 aluminum alloy, DH spacers let you run a 7-speed downhill configuration with standard Shimano or SRAM 10-speed cassettes Not compatible with XD� Drivers 24t Black 46g

 Tested by the UR/Polygon Team on the World Cup circuit, Box DH Cassette Spacers are a simple and cost-effective solution for your drivetrain needs CNC-machined from 6061-T6 aluminum alloy, DH spacers let you run a 7-speed downhill configuration with standard Shimano or SRAM 10-speed cassettes Not compatible with XD� Drivers 24t Orange 46g

 CNC-machined from long-wearing 7075-T6 aluminum alloy Designed to fit Shimano-compatible cassette hubs and have a 5mm wide inner base, giving a more solid interface with the cassette body Alloy cogs are anodized black with laser-etched graphics 18T x 3/32` 18T Black 18g

 CNC-machined from long-wearing 7075-T6 aluminum alloy Designed to fit Shimano-compatible cassette hubs and have a 5mm wide inner base, giving a more solid interface with the cassette body Alloy cogs are anodized black with laser-etched graphics 17T x 3/32` 17T Black 16g