Give your bike a little extra protection against punctures with the Schwinn Self-Sealing Bike Tube. Filled with a self-sealing gel that seals small holes quickly, this bicycle inner tube protects against flats for up to 2 years. This Schwinn tube is made from durable rubber and boasts a standard Schrader valve for easy inflation. Durable rubber construction Filled with a gel that quickly seals small holes Protects against punctures for up to 2 years Standard Schrader valve for easy inflation