The Blackburn Mountain Bike Tire in size 18" is a high-quality replacement tire designed specifically for mountain bikes. Made from durable rubber with a width of 2.125 inches, this black tire is compatible with sizes ranging from 1.75" to 2.125". It comes brand new in its original packaging, making it a reliable choice for cyclists looking for a quality tire to enhance their biking experience. With a weight of just 1 lb, this tire is easy to install and offers a smooth and stable ride on various terrains.