The ULTRAVERSE 20x4 E-Bike Fat Tire is a high-performance tire designed for electric bikes, mountain bikes, and fat bikes. Made of durable rubber and measuring 20 inches in diameter with a width of 4 inches, these black tires are compatible with various bike types. Suitable for off-road adventures, this product offers a smooth and sturdy ride for your cycling needs. With two tires included in the package, this product is a reliable choice for those looking to upgrade their biking experience.