[VAC] Re: Replacement Rims

["Gary Quamen" <g_quamen@xxxxxxxxxxxxx>]

Hi Y'all:

This from
http://edmunds.com/ownership/techcenter/articles/46431/article.html

The two basic parts of a wheel are the "spider," or the centersection that
bolts to the vehicle's brake drum or rotor, and the rim -- the outer lips
that contact and contain the tire beads. On most wheels, the spider is a
separate piece that is welded, riveted or bolted to the rim. Some custom
wheels are cast in one piece or machined out of a single piece of solid
billet-aluminum stock.

Passenger cars and light trucks use a "drop-center" wheel design, where the
center of the wheel is of a smaller diameter than the edges. Such a
configuration simplifies tire installation and removal. With a deflated
tire, it allows one bead to fall easily into the "dropped" centersection,
while the opposite bead is mechanically fitted over one of the rims. Most
modern wheels add a safety ridge, which are small lips that keep the tire on
the rim in the event of a flat or a blowout.

GQ '67 Safari