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 ...

When you eliminate the internal combustion engine from a car, the lack of engine noise highlights other sounds that would have otherwise been drowned out. This is actually a big issue for engineers ...

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 ...