- Designed specifically for single speed bicycles with a 10mm rear axle and an installation width of 4.5mm - 5mm. Please check the product details page for compatible models. - Constructed from durable aluminum alloy, ensuring strength and longevity for your bike. - Features a floating pulley and spring design that accommodates various gear sizes, effectively preventing the chain from slipping off the crank. - This bike chain tensioner is essential for maintaining optimal chain tension, improving your ride's efficiency and performance. Use Cases: - Ideal for urban commuters who rely on single speed bikes for daily transportation, ensuring a smooth and reliable ride without chain issues. - Perfect for bike enthusiasts looking to upgrade their fixie setup, providing enhanced control and stability during rides. - Great for casual riders who want to eliminate the hassle of chain derailment, allowing for a more enjoyable cycling experience. Enhance your single speed bike's functionality with this high-quality aluminum chain tensioner, engineered for performance and reliability.