This recommended practice contains dimensions and tolerances for outboard mounted brake drums and disc wheel hubs in the interface areas. This recommended practice is intended for outboard mounted brake drums and disc wheel hubs commonly used on class 7 and 8 commercial vehicles. Included are SAE J694 mounting systems II, III, IV, XIV, and X. Special and less common applications are not covered.
SAE J1671-2015 Referenced Document
SAE J393-2001 Nomenclature Wheels, Hubs, and Rims for Commercial Vehicles
SAE J694-2007 Disc Wheel/Hub or Drum Interface Dimensions Truck and Bus
SAE J1671-2015 history
2023SAE J1671-2023 Outboard Mounted Brake Drum/Disc Wheel Hub Interface Dimensions - Truck and Bus