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The Concord Bicycle Tube is a high-quality inner tube designed for 18-inch wheels with a width ranging from 1.75 to 2.25 inches. It features a Schrader valve for easy inflation and comes in a sleek black color. This tube is perfect for cyclists looking for a reliable and durable option to keep their wheels inflated and ready to roll. With free shipping included, it's a convenient and cost-effective choice for any rider.