Browse Standards J2803
WIP 2012-01-17

Dimensional Compatibility for Commercial Vehicle Wheels to Air Disc Brake Calipers—Truck and Bus J2803

This SAE Recommended Practice defines the boundary line for establishing dimensional compatibility between air disc brake calipers and 22.5 inch diameter disc wheels and includes valve stem consideration. The line establishes the minimum wheel with valve stem envelope to allow interchangeability. This document addresses dimensional characteristics only and makes no reference to the performance, operational dynamic deflections or heat dissipation of the system. It is up to the system integrator to ensure sufficient clearance exists between the caliper, wheel and valve stem to provide safe operating conditions. Mounting systems as noted are referenced in SAE J694.
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