When it comes to choosing car to carriers, you have to consider how much space you need. When you decide how much room you need, it is better to go a little larger than what you need. Depending on the type you choose, you may or may not need to have a roof rack already installed. Many of the newer carriers on the market do not need anything other than the hardware that is included in the price. They are very easy to install and you do not need to have expensive tools or bring the car into a garage to have the work done.
If you like the style of the car top carriers that are shaped like a box better than the collapsible styles, make sure that the one you choose is made from waterproof material. If you are storing things in the carrier where it doesn’t matter whether or not they get wet, then this doesn’t really matter.