Proprietor Quentin Brown pointed out with pride that his business, Xtreme Wheels & Tires, had a gratifying number of established clients follow it to its current space. The automotive outfitter--whose specialties are custom rims, window tinting and upholstery work--went from the main thoroughfare of Northside Drive to a Defoor Hills industrial park. His customers' loyalty was undeterred by that area's lack of MARTA accessibility. New clients might want to arrange a ride home beforehand, as the neighborhood is slightly remote.