Goodyear Tires 29 In. x 1.9 In. - 2.3 In. Heavy Duty Bike Tube, Black, 2 Pack Brand new in box - boxes have shelf wear creasing You will receive (2) TWO boxes No returns 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 95233 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. Butyl rubber heavy-duty bicycle tube. 50% Thicker than standard tubes. Comes with a Schrader valve. Puncture-resistant roll on through anything. Tire levers included. Designed to fit 29" x 1.9" up to 2.3" wheels. Proven Goodyear brand. Easy Installation.