IndyCar steering wheel

Ever wondered why there are so many buttons on F1 and IndyCar steering wheels?

Road & Track decided to get the answers from a man who uses one every day: IndyCar points leader Ryan Hunter-Reay. The basic controls include a push-to-talk button that allows the driver to communicate with his crew, plus toggles for push-to-pass, water for the driver, and a pit-lane cruiser button that caps the IndyCar's speed. The latter is protected by a guard so it's not inadvertently activated, which happened to Hunter-Reay last year in Brazil.

Watch the video below to see Ryan Hunter-Reay explain the wheel to his race-winning ride.