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 spoke wheels@ hubs and hub-rotor assemblies on the following axle designations. a. FF b. FL c. FC d. FH e. L f. R g. U h. W j. N k. P Purpose This document provides standardized wheel end ABS sensor interface dimensions for spoke wheels@ hubs@ and hub-rotor assemblies intended for normal highway use on trucks@ buses@ truck trailers and multi-purpose vehicles. The illustrations given in the document are for reference only. These illustrations show typical sensor ring designs and mountings@ but are not limited to those shown. Serviceability considerations are not covered in this document.