Scope of application Universal fit for most motorcycles. Mini Bike Parts is manufactured to the original factory specifications and standards. Wheel diameter 3.3 cm (1.30 in). Clamp adjustable range 3.7-4.3 cm (1.46-1.69 in). It is designed for long service with minimal need for replacement. Product function Chain adjust tool with a solid, practical design. Prevents chain slack to keep your ride smooth and safe. Automatically adjusts the chain to avoid manual adjustments. High quality construction. High-Quality Material Mini Bike Chain Tensioner uses premium iron and plastic materials for durability, reliability, wear resistance, and long service life. Safer and more robust than similar products. An ideal choice for most riders. Easy to Install Simple assembly and disassembly. Easy to replace a broken or worn tensioner, saving time and effort. A practical upgrade that enhances comfort and performance. Use scenarios - Routine chain maintenance on street or off-road motorcycles using a universal tensioner. - Replacement after wear or damage to restore proper chain tension during a trip. - Upgrading an older bike with a universal tensioner to improve reliability and safety.