This SAE Recommended Practice establishes the Antilock Brake System [ABS] sensor interface and envelope dimensions for standardizing the location of the ABS rings mounted on the inner end of the hub on the following axle designations. a. FF b. FL c. L d. R e. U f. W g. N h. P Purpose This document provides standardized wheel end ABS sensor interface dimensions for spoke wheels and hubs intended for normal highway use on trucks@ buses@ truck trailers and multi-purpose vehicles.