As people move into cities and as we continue to try and combat global warming, biking is becoming a more useful mode of transportation than ever - it's not just for exercise anymore. But bikes mostly look the same as they always have. There's plenty of technology under the hood, advances you might never notice but that will make you go faster, stay safer, and bike more conveniently than ever. And there are a few changes you'll notice as soon as your foot hits the pedal.

This is Top Shelf. Join David Pierce and friends as they look into the future of two-wheeled transportation, and find out why it might be more high-tech than we think.