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 to raise the flat tire up 5.5" for changing. Trailer Aid Plus has an additional 1" lift more than the original Trailer Aid and is perfect for RV trailers and horse trailers. It is great for horse trailers so you do not have to remove your horses in order to change a flat tire. The extra 1" lift is handy when performing routine maintenance on the trailer. Lifetime guarantee. Easily change flat tire on tandem wheel trailer Allows you to keep cargo in trailer while changing tire Simply drive the good tire up onto Trailer Aid 5.5" of lift to aid in performing routine maintenance Made of lightweight super strong polymer