Product Code:SAE J1842 Title:Disc Wheel Hub/Spoke Wheel and Axle Interface Dimensions--Commercial Vehicles Issuing Committee:Truck And Bus Wheel Committee Scope:This SAE Recommended Practice is intended for hubs and spoke wheels used on Class 7 and 8 truck/truck-tractor nonpowered front axles, powered and nonpowered rear axles, and trailer axles.