Introducing our high-quality 24 inch 21 speed adult bicycle mountain bike! As a factory, we specialize in producing top-of-the-line bicycles that are perfect for all types of outdoor adventures. Made with durability and performance in mind, our mountain bike is designed to take on any terrain with ease. With 21-speed options, you're guaranteed to find the perfect gear for any incline or decline. The bike's lightweight frame and comfortable seat make for a smooth and enjoyable ride every time. Whether you're hitting the trails or cruising around town, our mountain bike is an excellent choice for any outdoor enthusiast.