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