Our Air-Tech wheels kits are a quick and simple way to upgrade the wheels on your plane. All pieces and parts are included in the kit. We are “assuming” that these kits will be installed on the Quicksilver MX/MXL/MXII/MXLII or Sport 2-S models and are replacing the original equipment plastic wheels. All kits include steel axles and axle bushings. If these kits are going on the GT model the price will be approx. $40.00 less. It is very important that we know exactly what model aircraft and what type of brake system in any.