4wdworld.com sells a product called the EEzy Wheel, which is an inflatable device that lifts your truck tire and wheel onto the hub of your pickup for you, effortlessly. The unit operates from air pressure in your spare tire, eliminating the need for an air compressor (although you can use one if you'd like). The EEzy Wheel Lift supports up to 175 pounds, and is compact and can be easily stored away.
Click here to view the EEzy Wheel page on 4wdworld.com.