What it does and why you need it Keeps your chain reliably tensioned using a floating pulley and spring adjustment system, reducing chain slip and derailment on rough trails or bumpy roads. Ideal when converting a bike to single-speed or when you want a simple, low-maintenance tensioning solution for one-speed setups. Key benefits Stable chain performance: floating pulley absorbs chain movement and the spring adjustment maintains consistent tension, so you spend less time fixing the chain and more time riding. Lightweight and unobtrusive: at only 3 ounces, it adds minimal weight and won’t affect bike handling or pedaling efficiency. Easy installation: tool-free mounting gets you back on the road quickly—no special tools or long setup required. Durable construction: made from strong aluminium alloy and stainless steel for corrosion resistance and long-term durability under mountain biking conditions. Important attributes Function: single speed chain tensioner with floating pulley and spring adjustment for continuous, reliable tension. Size/weight: compact design at 3 ounces for minimal added mass. Materials: aluminium alloy body and stainless steel hardware for strength and longevity. Compatibility: designed for use as a single-speed converter and compatible with a wide range of bikes—suitable for riders who need a dependable tensioning solution across different frames and riding styles. Practical use scenarios Mountain trails: prevents chain drop and slipping on rough, technical terrain so you can focus on control and line choice. Urban commuting: provides a low-maintenance tensioning option for single-speed or converted commuter bikes that face stop-and-go traffic and potholes. Field repairs and bikepacking: lightweight, tool-free installation makes this a practical addition for on-the-go single-speed setups during long rides or multi-day trips. Why it stands out Combines a simple, tool-free user experience with robust materials and an effective floating pulley/spring system to deliver dependable chain tension without added complexity.