Camcos Trailer Aid Plus is the fast, safe, and easy way to change a trailer tire on a tandem wheeled trailer. You pull the good tire up onto Trailer Aid Plus in order to raise the flat tire up 5.5 inches for changing. Trailer Aid Plus lifts 1 inch higher than our original Trailer Aid, making it perfect for routine maintenance on RV trailers; this tool even lets you change a flat tire on your horse trailer without removing your horses. Moreover, it is quite user-friendly and easy to store away when not in use. Please note that this product will not work with trailers with narrow axles with equalizing leaf springs or axles with spacing greater than 36 inches axle to axle. Camco has been creating your favorite outdoor products like camper accessories, horse trailer accessories, and trailer accessories since 1966, earning a reputation for providing superior goods with high customer approval.