What this product does Converts 8 to 12speed bicycles into a reliable singlespeed setup while providing adjustable chain tension for consistent performance. Designed for easy installation on singlespeed builds or when converting a multispeed bike to singlespeed, suitable for riders of all skill levels. Key benefits — why you need it Keeps chain tensioned and reduces the risk of chain drops, making singlespeed riding more dependable. Eliminates the need for a rear derailleur when converting a bike, simplifying maintenance and drivetrain setup. Floating pulley adjust wheel lets you finetune tension to match chain length and frame spacing, improving pedaling smoothness and chain retention. Main features Compatibility: Works with bicycles that have 8 to 12speed drivetrains and with singlespeed conversions. Installation: Simple to fit for hobbyists and mechanics alike; no advanced tools or complex setup required. Adjustment: Floating pulley adjust wheel provides precise, onbike tensioning to prevent slack and drops. Performance: Stabilizes chainline and tension for smoother pedaling and more reliable singlespeed operation. Typical use scenarios 1. City commuter conversion: Turn an 8speed commuter bike into a lowmaintenance singlespeed for short rides and stopandgo urban traffic. 2. Weekend fixerupper: Convert a 10 or 12speed bike to singlespeed after a derailleur failure so you can continue riding without a full . 3. Custom build or track practice: Use when building a singlespeed or fixedgear bike from a multispeed frame to achieve a simplified drivetrain with adjustable tension. Practical considerations Intended function is chain tensioning and singlespeed conversion; ensure your frame dropouts and axle spacing are compatible with a singlespeed setup before installation. The floating pulley adjust wheel should be set so chain runs without slack but not overtensioned; small adjustments can prevent noise and premature wear. Suitable for riders seeking a straightforward conversion or a simpler, more robust drivetrain for daily use or training. This chain tensioner provides a straightforward way to convert and stabilize singlespeed drivetrains, with an adjustable floating pulley to tailor chain tension and reduce drops.