The NEW Advanced 20 x 4.0 Fat Bike Folding ATB MTB Tire in Blackwall is a high-quality, durable tire designed for mountain and fat bikes. Made of rubber with a knobby tread, this tire offers excellent traction and stability on off-road terrain. Its foldable design makes it easy to transport and store when not in use. This set includes one tire with a width of 4 inches, perfect for challenging riding conditions. The Advanced brand ensures reliability and performance, making it an ideal choice for cyclists looking for a sturdy and versatile tire option.