Camco Yellow RV Wheel Stop-Stabilizes Your Trailer by Securing Tandem Tires to Prevent Movement While Parked-Large (44622) Stabilize the trailer with a single piece of equipment Secure tandem tires to prevent movement while parked or rehitching Easy to use and easy to store, Helps prevent the trailer tongue wheel from sinking into soft ground Fits 26" to 30" diameter tires Fits tires with spacing of 3-1/2" to 5-1/2". Please view video for further instruction on fitting this wheel stop to your tire.