Bike Tire Size: 20x2.125(57-406); Inflate to 40 P.S.I. (280Kpa). Weight max load to 75kg(165lbs). Suits for kids-Bike,mountain bike and folding bike. Material: Made of high-quality nylon and rubber composite materials. The inner tire is constructed with soft steel wire, which can be easily folded. This design significantly enhances the tire's wear resistance and extends its service life. It is sturdy and durable, capable of easily handling various road conditions. Outstanding Drainage Performance: The tread of this tire is designed with a quadrilateral and groove pattern, which helps with drainage. This enables excellent braking and handling performance on rainy days or on slippery roads, providing better grip and stability. Outstanding Grip: The surface of the tires is equipped with anti-slip particles, which enhance the friction between the tires and the ground, thereby improving the grip of the tires. In wet or complex road conditions, this texture can provide better traction and reduce the possibility of skidding, thus adapting to complex road environments. Multiple Colors: This tire is designed with various colors. You can choose the appropriate color based on your bicycle, adding a highlight to your bike's appearance and making it stand out. Easy to install: Our tire kit comes with two tire wrenches, making it convenient for quick inflation and deflation. It is perfect for daily tire replacements and enables riders of all skill levels to easily maintain their tires. 20 x 2.125 Bike Tire