Trailer-Aid Tandem Tire Changing Ramp, The Fast and Easy Way To Change A Trailer's Flat Tire, Holds up to 15,000 lbs, 4.5 Inch Lift (Yellow) Easily change flat tire on tandem wheel trailer even if you're alone Allows you to keep cargo in trailer while changing tire Simply drive the good tire up onto Trailer Aid Provides 4.5" of lift Made of lightweight super strong polymer