The Camco Large RV Wheel Stop is designed to help stop your trailer's tandem tires from shifting, using just one piece of equipment. It fastens your tandem tires while you are parked or re-hitching. This Wheel Stop fits 26"-30" dia. tires with tire spacing from 3.5" to 5.5". It installs easily between your tires and features raised ribs for increased traction and less slippage. Made of a lightweight, durable polymer with a rubber handle. Note: To determine tire spacing, measure between both tires from tread to tread at their closest point together. For recreation vehicles only.• Stops your trailer's tandem tires from shifting, using just one piece of equipment• Fastens your tandem tires while you're parked or re-hitching• Works with 26"-30" diameter tires• Fits tires spacing from 3.5" to 5.5"• Raised ribs for increased traction and less slippage• Made of lightweight and durable polymer with a rubber handle Fits 26""-30"" dia. tires with spacing from 3.5"" to 5.5"" Raised ribs for increased traction & less slippage Made of lightweight, durable polymer with rubber handle