Features [24-Speed Shifter System & Sensitive Brake System]: Featuring a Shimano 24-speed shifter lever, this system ensures smooth and effortless gear changes. The sturdy aluminum frame guarantees durability for long-lasting rides, while the double disc brakes deliver precise braking performance, enhancing your riding safety. [Lightweight Frame & Adjustable Riding Position]: Distinguished from traditional curved road bikes, the straight handlebar allows you to ride this bike on both roads and mountains. Its lightweight frame ensures easy portability, perfect for trips and travel. [Suitable Rider Height]: Designed for riders between 5’6″ and 6’2″, the height-adjustable saddle offers an ergonomic and comfortable riding position, giving you complete control over your leisure rides. [High-Quality 700C x 25C Tires]: Equipped with anti-slip and wear-resistant tires, this road bike is suitable for various riding environments, including mountain roads, grasslands, muddy terrain, gravel roads, sand roads, and flat terrains. [Effortless Installation & Customer Service]: Our package includes detailed illustrated instructions, making the installation process straightforward and hassle-free. It can be done in approximately 15 minutes. Product Information Bike Type: Road Bike Age Range (Description): Adult Number of Speed: 24Speed Wheel Size: 700C Frame Size: 21 inch Frame Frame Material: Aluminum Alloy Frame Color: Sliver/Blue/White/Black Suspension Type: No Brakes: Front and Rear Disc brakes Special Feature: Lightweight Installation Steps Please open the box to check if the accessories are complete. Including:overall frame front wheel,handlebar,saddle,a pair of foot pedals,front and rear reflectors,tool kit,bicycle manual. Adjust the Direction of the Stem and Front Fork Handlebar Assembly Saddle Assembly Front Wheel Assembly Pedals Assembly For detailed installation steps, please refer to the installation manual included in the package.