Pin type forks have no standard shape or size. They vary from OEM to OEM and by trucks within a brand. Because of this we ask many questions of customers. We use 2 drawings to gain dimensional data needed to make the forks to fit. These tell us where the fork tubes are located. The most important dimension is the location of the tube center in relation to the rear face of the fork shank. This dimension tells us the “offset” or “inset” of the tube, or whether it is “in-line.”
In relation to the rear face of the fork shank, offset means the tube center is located toward the driver. Inset means the tube center is located toward the load. In line means the center is directly above the rear face.