The open and aggressive tread design gives the Rugged tires excellent soil penetration and mud removal.With a tight convex knob tread pattern, it provides excellent grip on a variety of roads. Enhances performance and traction on hard surfaces.Wide tire volume for better control and less drag, and premium rubber material with excellent puncture properties for beach, snow, rough terrain and street riding.The carbon steel ball design allows the tire to fold without damage for easy storage.The tires are specific bicycle tires designed for off-road riding. Suitable for bicycles, electric bikes, snowmobiles, mountain bikes.TPI: 30; Inflate up to 20 I.Note: The package includes a bicycle tire, not the rim. Both front and rear wheels can be used.Color:BlackMaterial:rubbersize:20 x 4.0 InchPackage Contents:1 x bicycle tireOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.