Be more confident about going on a biking adventure with this Goodyear 29" x 1.9" 2.3" heavy-duty tube installed. This model is made of butyl rubber, which provides a smooth ride for every age rider and almost any type of bicycle. These heavy-duty Goodyear tubes are 50% thicker than the conventional types, making them much more puncture-resistant. Whether you're cycling on a paved surface or rough countryside terrain, you can count on these tires to deliver you to your destination with ease. This 29" bicycle tube is made to fit all 29" bikes with tire widths ranging from 1.9" to 2.3". It features an American or Schrader valve that fits any hand pump or floor pump. About The Goodyear Tire & Rubber Company: Goodyear is one of the world's largest tire companies. It employs about 68,000 people and manufactures its products in 53 facilities in 20 countries around the world. Its two Innovation Centers in Akron, Ohio, and Colmar-Berg, Luxembourg, strive to develop state-of-the-art products and services that set the technology and performance standard for the industry. For more information about Goodyear and its products, go to www.goodyear.com/corporate.