The Gibbs Quadski is an amphibious quad bike/ATV, launched in October 2012 by Gibbs Sports Amphibians. The Quadski is a 4-stroke amphiquad that converts from a quad bike/ATV to a personal watercraft. It can attain a top speed of 72 km/h (45 mph) on both land and water. The Quadski uses a marine jet propulsion system as well as wheel retraction, allowing it to transition between land and water.