When considering a rooftop tent the rack system supporting them is the most important factor to consider. Most importantly, can the crossbar system hold the weight of the tent itself? Most crossbar systems of good quality can hold up to 165 lbs when the vehicle is moving, some factory crossbars and “universal” rack systems may have a lower weight rating around the 100 lb range. If you already have crossbars, we recommend checking with the manufacturer of the bars to confirm both the dynamic weight capacity, as well as the static weight capacity. As the name suggests, the static weight capacity is the amount of weight the rack can hold when the vehicle is parked. This often is greater than the dynamic weight load by 1.5 - 2.5x depending on rack style and manufacturer. If you are starting from scratch, we would highly recommend not going with the least expensive crossbar option you can find online. A system from a reputable brand such as
Yakima,
Thule,
Rhino-Rack, etc., is worth the extra investment to prevent issues arising with your rooftop setup or worse, losing the tent while driving. Their systems are tested on each vehicle and are often vehicle specific. This allows for a proper fitting, reliable rack system that you can feel confident in. There are of course more rugged systems on the market designed for off road use, and those of course are designed with rooftop tents in mind making them plenty capable.