Camco's Small RV Wheel Stop helps stop your trailer's tandem tires from shifting, using just one piece of equipment. It keeps your tandem tires in-place while you are parked or re-hitching. This wheel stop fits 26 to 30-inch diameter tires with a tire spacing of 1 1/2-inches to 3 1/2-inches. It installs easily between your tires and features raised ribs for increased traction and less slippage. Made of a lightweight, durable polymer construction with a rubber handle. Note: To determine the tire spacing, measure between both tires (from tread to tread at their closest point together). For recreation vehicles only.