Guy builds his gravity racer | Guy Martin Proper

Guy attempts to build and race the world's fastest soapbox racer, creating a unique design with help from expert designers, and training with the Team GB women's bobsled pair. To watch the full episode click here - https://www.channel4.com/programmes/s... #GuyMartin #Speed #GravityRacer Welcome to the only official Guy Martin Proper YouTube channel. Make yourself a cup of tea or twenty & follow every race, every build and every country Guy visits. Fair play. Subscribe here https://bit.ly/2OwyYOY