Wheel chocks prevent your RV or trailer from rolling when parked, unhitched, or while you are leveling. They are a basic safety item that belongs in every RV—a runaway trailer or motorhome can cause serious damage or injury in seconds.

Types of wheel chocks

• Rubber wedge chocks: Simple, inexpensive, and effective. Place in front and behind a tire.
• Interlocking wheel chocks: X-shaped chocks that cradle both sides of a tire simultaneously. Popular brands include X-Chock and BAL.
• Tandem axle stabilizers: Chocks designed to fit between dual axle tires, reducing rocking motion.
• Heavy-duty chocks: Larger chocks for fifth wheels and heavy trailers with higher weight ratings.

When to use chocks

• Any time the trailer is disconnected from the tow vehicle.
• While leveling—before you put weight on jacks or stabilizers.
• On slopes, even slight ones.
• When working under or around the RV.

Sizing

Match chock size to your tire size. Most passenger and light truck tires work with standard chocks. Larger RV tires may need heavy-duty versions. Interlocking chocks are adjustable and fit a range of tire widths.

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