This 21-speed folding bike perfectly combines riding comfort and portability. Its streamlined high-carbon steel frame with full suspension makes it suitable not only for mountain biking but also for everyday commuting and urban professionals. It features a Polly dual-disc brake system, with factory-calibrated shifting and braking, and supports manual fine-tuning of the brake cable tension for safe operation. Equipped with a 7-tower flywheel and thumb shifter, the chain drive and 26-inch spoked tires on aluminum alloy wheels provide a stable riding experience. The seat is height-adjustable and requires simple installation right out of the box, making it easy to adapt to various urban mobility scenarios.