This SAE Recommended Practice defines a clearance line for establishing dimensional compatibility between drum brakes and wheels with 19.5 in, 22.5 in, and 24.5 in diameter rims. Wheels designed for use with drum brakes may not be suitable for disc brake applications. The clearance line establishes the maximum envelope for brakes and minimum envelope for complete wheels to allow for interchangeability. This document addresses the dimensional characteristics only, and makes no reference to the performance, operational dynamic deflections, or heat dissipation of the system. Valve clearances have not been included in the fitment lines. Bent valves may be required to clear brake drums. Disc brake applications may require additional running clearances beyond those provided by the minimum contour lines. Mounting systems as noted are referenced in SAE J 694.
SAE J1865-2007 Referenced Document
ISO 3911:2004 Wheels and rims for pneumatic tyres - Vocabulary, designation and marking
ISO 4107:1998 Commercial vehicles - Wheel hub attachment dimensions
SAE J2133-2001 Disc Wheel Radial Runout Low Point Marking
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 J1865-2007 history
2020SAE J1865-2020 Dimensional Compatibility for Commercial Vehicles Fitment of Complete Wheels in Drum Brake Applications - Truck and Bus
2016SAE J1865-2016 Dimensional Compatibility for Commercial Vehicles Fitment of Complete Wheels in Drum Brake Applications - Truck and Bus
2007SAE J1865-2007 Dimensional Compatibility for Commercial Vehicles Fitment of Complete Wheels in Drum Brake Applications Truck and Bus
1999SAE J1865-1999 Dimensional Compatibility for Commercial Vehicles Fitment of Complete Wheels