Add Yahoo as a preferred source to see more of our stories on Google. Foam-filled tires are made of regular rubber but replace the air inside with hardened liquid urethane. While they come with ...

Tires filled with pressurized inner tubes have helped to propel all kinds of bicycles for the past 100 years, but these tires are vulnerable to puncturing and require regular inflation. Airless bike ...

Following is a transcript of the video. Narrator: This is a tire technician disassembling what's known as a foam-filled tire. It's a grueling process, but an important one for these special kinds of ...