Who this store serves
A service list that carries mining fleet services and OTR services alongside brake repair and oil changes describes a store serving two very different customers in the same week. Southern Arizona runs heavy equipment and long-haul freight, and the same city has drivers who need a car looked after. Tucson is staffed and stocked for both, which is why it carries every tire category Purcell sells, from OTR tires through to passenger tires.
For a fleet, the useful consequence is that one store covers the truck, the trailer, the service pickup and the owner's car.