Race trucks do not run super-aggressive tires because the tread lugs will get ripped apart by the high horsepower and high speeds while traveling over rough terrain. The BFGoodrich Baja T/A KRT is a sort of hybrid for racers looking for more traction out of a race-style tire. The tread design is much more aggressive than a standard Baja T/A, but the KRT still has a low-profile tread depth to keep the lugs from being ripped off even though the void spacing is large.
Also, notice the ribs on the sidewall of the tire? That's how you can tell a BFGoodrich race tire from a street-legal one. The Baja T/A KRT has no street-legal version, but the Baja T/A has one-and with no ribs on the sidewall.