AST Air Jack 55mm - 233mm Stroke 480kg LiftPrepare yourself for an easy wheel change, a quick maintenance or anything that may go wrong during a day on the track. With these airjacks you are ready for a fast and effective repair, so you can quickly hit the race track again. With the AST's Air Jacks it's very easy to lift the car's wheels off the ground in just moments. With a lance (not included) you can apply air to the car, and the car will be raised off the ground. Easy to use. Stroke