Ultra4 Racing is an extreme off-road racing series that blends high-speed desert racing with technical rock crawling, pushing both drivers and vehicles to their limits. Originating from the legendary King of the Hammers race, Ultra4 has grown into an international motorsport with a series of grueling races designed to challenge competitors in the most demanding terrains.
New rules for the 2019 Ultra4 Racing season will allow single-seat Polaris RZR RS1 to compete at King of the Hammers. Previous rules specifically stated that vehicles must have driver and…
