Use the BISupply Tandem Tire Changing Ramp to lift your vehicle so you can easily change a tire on a tandem axle vehicle by yourself without having to empty your trailer. Constructed of durable polypropylene (PP) plastic, these RV wheel jack ramps are designed for maximum strength and durability. The textured surface provides superior traction to help guide your wheel up the ramp. The unique concaved design preserves the shape of your tires making them ideal for long-term storage. 7-inch tall ramp provides a 5.5 inch concaved lift and has a total length of 24 inches. With an 8-inch width base and a 10 ton (20,000 lb.) lifting capacity per RV tire ramp, you will be ready for anything. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.