This 27-speed folding mountain bike perfectly combines all-terrain performance with portability. Its high-carbon steel frame and spring-loaded suspension fork effectively absorb road bumps, making it easy to handle for both mountain biking and city commuting. As a folding bike, it's incredibly convenient to carry and store. It's factory-tuned and equipped with reliable dual disc brakes and a disc hub, with manual brake adjustment. Its drivetrain comprises a 9 tower wheel, integrated shifters, and a 110-speed chain for precise and smooth shifting. Equipped with aluminum alloy wheels. It's easy to install. Contact customer service for installation instructions if needed.