Information About

Boxpok




A Boxpok is a type of Steam Locomotive Wheel where the wheel is cast rather than having Spoke s (the name is a variation on "box-spoke"). Being hollow, they allow better Counterbalancing than conventional drivers, which is important for fast locomotives. The Boxpok wheel was patented by General Steel Castings Corporation of Granite City , Illinois .

The Bullied Firth Brown (BFB) wheels designed by Oliver Bullied and Firth Brown were a later variation though a separate patent where even lighter wheel was obtained by using a strengthened rim.