New 11++ 20 In Bike Tires. Eastern bikes 20 inch bike tire packages for kids and bmx tires. If you have tubed tires now, switching to tubeless will offer a substantial performance upgrade. 20 bike tires come in a variety of style for everything from the ripping the skate park to commuting to school. A wide variety of 20 in bike tire options are available to you, such as use, is_customized, and combo set offered.