This 21-speed mountain bike is the perfect blend of lightweight and high performance. It features an aluminum alloy frame and lightweight, durable spoked magnesium alloy wheels with 27.5-inch aluminum alloy double rims, ensuring a lightweight frame while significantly improving speed and handling stability. Equipped with a front suspension system, it effectively handles rough roads and the bumps of daily commuting. Factory-calibrated shifting and braking, the reliable Polly dual mechanical disc brakes allow for manual fine-tuning to ensure secure braking. The drivetrain consists of 7 tower wheels, a thumb shifter, and a 108 chain for precise and smooth shifting. With a load capacity of up to 265 pounds. The seat and handlebar height are adjustable to accommodate riders of different heights.