You won't have to worry about simple flats with the Bell® 20" self-sealing inner tube. This tube contains a sealant that will instantly plug holes up to 1/8" while you ride. It lasts the life of the tire, and it will never dry out. The bike tube fits tires 1.75" to 2.125".
Sealant inside seals most holes up to 1/8" instantly while you ride