Looking for a high-quality inner tube for your 18-inch bicycle? Look no further than this Concord inner tube, which is compatible with tube sizes ranging from 1.75-2.25 inches. This tube features a Schrader valve and is made from durable materials to ensure long-lasting performance on the road. Whether you're a casual cyclist or a serious rider, this tube is the perfect choice for your next ride. With its sleek black color and reliable construction, this Concord inner tube is a must-have for any bicycling enthusiast. Simply install it in your bike's tire and enjoy a smooth, comfortable ride with minimal hassle. So why wait? Order your Concord inner tube today and experience the ultimate in cycling performance and quality!