determining {TAIL ~ a first test toe angle} of the first wheel relative to {HEAD ~ a first toe angle reference point} 
determining { TAIL ~ a first test toe angle } of the first wheel relative to { HEAD ~ a first toe angle reference point }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD