Our Pro III trucks feature the traditional kingpin style, are best used for skating parks, street, or carving, and the knurled kingpin stays securely in place while riding all types of terrain. The 356 Aluminum and Chromoly axle have become the ‘gold-standard’ of the truck industry and have proven themselves through years of use and abuse. This heat-treated aluminum cannot be die-cast, and is responsible for the strength and familiar grind characteristics you should expect from a quality truck. Pro III trucks feature a 6-hole baseplate for old school or new school mounting and come with 89A barrel/cone bushings.