This SAE Recommended Practice is to establish the Antilock Brake System (ABS) sensor interface and envelope dimensions for standardizing the location of the Antilock Brake System (ABS) rings mounted on the inner end of the hub on the following axle designations: a. FF front; b. FL front; c. L powered rear; d. R powered rear; e. U powered rear; f. W powered rear; g. N trailer and h. P trailer. This document provides standardized wheel end Antilock Brake System (ABS) sensor interface dimensions for spoke wheels and hubs intended for normal highway use on trucks, buses, truck trailers, and multipurpose passenger vehicles.