The best way to choose the right strap on bike rack for your vehicle is to first determine what type of vehicle you have. There are many different types of strap on bike racks available, so it is important to choose one that is compatible with your vehicle. For example, if you have a car with a trunk, you will want to choose a strap on bike rack that attaches to the trunk. If you have a SUV, you will want to choose a strap on bike rack that attaches to the roof. Once you have determined what type of vehicle you have, you can then narrow down your choices by considering the size and weight of the bikes you want to transport, as well as the number of bikes you want to transport.