Patriot Docks Axle Converters - Pair The Axle converters are mounted to vertical support pipe, and accept a wheel axle pipe both 1 12 sch 40 pipes. The axle converters are required to add rolling wheels to a dock. 2-116 i.d. For a 4 wide dock use 6 axle, for 8 wide dock use 8 axle. Patriot Dock components are modular to make it easy to customize the size and configuration for maximum versatility. We have prepared many dock packages which can be combined to almost any layout. Your dealer can put