This rack will transport up to 2 bikes. It is mad of solid steel construction and is built for 4 to 4.5″continuous welded steel bumper. Simple and easy to attach and use.The 2-Bike RV Bumper Rack provides an easy solution for carrying bikes on the back of an RV. The sturdy rack mounts onto a 4 to 4.5-inch continuous, welded steel bumper and provides a platform where you can stand your bikes. The rack boasts solid steel construction and offers a weight capacity of 30 pounds per bike.