Please note that this carrier is clamped around the roof bars and therefore will not fit to Dropracks systems, Thule ProBars and Thule Slidebars (they are too deep, and they also slide). The SUP and board carrier; canoe and kayak carrier; watersports carriers and accessories > For the vehicle roof (fixed to a pair of roof bars, so look out for our money saving package deals) or else lifted up from a pickup bed. Be sure to use tie-down straps at front and back!