The pivot arm swings the tire into {HEAD ~ a position} over {TAIL ~ the wheel} wherein a sector of the tire beads are laterally opposite the radial perimeter surface of the wheel 
over
The pivot arm swings the tire into { HEAD ~ a position } over { TAIL ~ the wheel } wherein a sector of the tire beads are laterally opposite the radial perimeter surface of the wheel
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH