Box One Single Speed Chromo Cogs Product Overview The Box One Single Speed Chromo Cogs are CNC-machined chromoly sprockets designed for Shimano-compatible cassette hubs. Available in 13T–18T with heat-treated construction and 5mm wide inner base, they provide durable, lightweight performance for single-speed BMX drivetrains. Key Features CNC-Machined Chromoly Construction – Heat-treated chrome-molybdenum provides superior durability and wear resistance Shimano-Compatible Driver – Works with standard Shimano cassette hub shells for straightforward installation 5mm Wide Inner Base – Thicker base interface provides solid engagement with cassette body; resists slippage Heat-Treated Steel – Professional heat-treatment process increases hardness and extends cog lifespan 3/32" or 1/8" Chain Compatible – Works with both narrow and wide single-speed chain widths Heavy-Duty Construction – Engineered to withstand high single-speed tension and aggressive riding Lightweight Design – Minimal material usage reduces rotational weight (8–18g depending on tooth count) Laser-Etched Logos – Durable branding without added weight Multiple Tooth Options – Available in 13T, 14T, 15T, 16T, 17T, or 18T for gearing flexibility Professional Racing Component – Proven durability suitable for competitive BMX racing Technical Specifications Material: Heat-treated chromoly steel Driver: Shimano-compatible cassette type Chain compatibility: 3/32" or 1/8" Inner base width: 5mm Tooth count options: 13T, 14T, 15T, 16T, 17T, 18T Finish: Laser-etched logos Weight by tooth count: 13T: 8g (0.3 oz) 14T: 11g (0.4 oz) 15T: 13g (0.5 oz) 16T: 14g (0.8 oz) 17T: 16g (0.6 oz) 18T: 18g (0.65 oz) Compatibility & Ideal Use Cases Shimano Cassette Hubs – Compatible with Shimano-compatible cassette hub shells; verify your hub type before ordering Single-Speed BMX – Purpose-built for high-tension single-speed drivetrains Fixed-Gear Setups – Works with fixed-gear conversion hubs using Shimano cassette interface Chain Width Flexibility – Compatible with both 3/32" (narrow) and 1/8" (wide) chains Racing Applications – Heat-treated construction resists wear under competitive racing loads Gearing Options – 13T (tall gear for speed) through 18T (lower gear for acceleration) accommodate riding preferences Weight-Optimized Builds – Lightweight design (8–18g) suitable for racing-focused setups All Rider Types – Suitable for beginners through professional BMX racers Build Requirements & Compatibility Shimano Cassette Hub Required – Must have compatible Shimano cassette hub shell (not threaded freewheel) Chain Selection – Choose 3/32" or 1/8" chain width matching your drivetrain Tooth Count Selection – Select based on desired gearing: smaller teeth (13T–14T) for speed, larger teeth (17T–18T) for acceleration Proper Installation – Slide cog onto cassette hub and secure with locking ring or cassette locknut Chain Alignment – Verify chain runs true and doesn't rub on frame or wheel Important Notes Ships direct from manufacturer in USA; may ship separately from other orders Shimano-compatible only; not compatible with threaded freewheel hubs Heat-treated chromoly provides superior durability compared to standard steel 5mm inner base wider than standard, providing solid interface and reducing slippage Tooth count selection critical: 13T–15T for speed, 16T–17T balanced, 18T for acceleration Compatible with both 3/32" and 1/8" chain widths; verify your chain width before purchasing Lightweight design ideal for racing builds; weights 8–18g depending on tooth count Laser-etched logos provide durable branding without weight penalty Professional-grade component suitable for competitive racing and serious training CNC machining ensures precise tooth profile and consistent engagement Heat treatment increases hardness; resists wear through extended racing use Verify your hub is Shimano-compatible cassette type (not threaded freewheel style) **Due to unique nature of this item, ALL sales of this product are FINAL. No Refunds or Returns**
