Easy Single-Speed Conversion for Shimano HG Freehubs. Transform your ride effortlessly with our innovative single-speed conversion kit, designed specifically for standard 7-12 speed Shimano HG freehub bodies. This comprehensive set includes. CNC 7075 aluminum single speed cog. Precision spacer set (5mm, 7mm, 12mm). No extra parts are required for a complete conversion. Please note, this product is not compatible with Microspline or SRAM XD drivers. Unmatched Strength & Chain Security. Constructed from solid aircraft-grade 7075 aluminum in a robust one-piece design, this cog is built to endure hard jumps and intense pedal mashing. Extra-tall, narrow-wide teeth for superior grip. Significantly reduces the risk of chain drops. Engineered for Stability & Longevity. The 9mm thick base provides a sturdy foundation that evenly distributes pedaling forces, protecting your freehub from damage. With perfect roundness and a precision tooth profile, this cog ensures. Longer lifespan compared to ordinary aluminum cogs. Ultra-Lightweight for a Responsive Ride. Weighing just 66 grams, our cog minimizes rotational mass compared to heavier steel alternatives. A more lively and connected feel to your drivetrain. Precision Spacers for Perfect Chainline. Achieve a silent and efficient setup every time with our included spacer combo (5mm, 7mm, 12mm). This allows for precise chainline alignment, eliminating chain rub and wobble. Ideal for DIY enthusiasts and backed by our quality promise-build your dream bike with total confidence.