Sand pirates use all manner of improvised vehicles to attack those that may have something they want. Everything from small swoops to stolen racers are outfitted with makeshift weapons of destruction.
When the mining companies abandoned Tattooine due to lack of exploitable resources, they left behind thousands of pieces of machienery ranging from small sonic excavators to massive mobile smelting factory sandcrawlers. The sand pirates have taken advantage of many of these derelict vehicles, especially a small fleet of dune borers which they use to attack their enemies from below.
Dune Borer Pilot:
Driving the Dune Borer: