Combat rims are run-flat....


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Posted by Chriscase [76.212.212.203] on Sunday, August 01, 2010 at 21:32:48 :

In Reply to: combat or split rims posted by clueless [201.202.25.26] on Friday, July 30, 2010 at 21:29:45 :

The bolts were a necessity to make the run flat work. NOT to be easier to change.

Very few of the combats have the third part inside any more. It's a steel band the goes in between the beads, then on rim assembly the beads get clamped between the rim half with the band sandwiched. Keeps the beads "rim locked", which is an alternate name for 'run flat' rims.

LAV wheels are also run-flat. But instead of the steel band, they use a big rubber doughnut. It not only locks the bead to the rim, but acts as a small internal tire, so a flat behaves more like it has air in it. These rims use a mechanical contrivance to compress the ring-tire-doughnut sandwich, so that a third steel part, a 16" diameter snap ring, can be used instead of bolts.

Hummer wheels are a hybrid of those two designs. Inner doughnut, but bolt together. After-market two piece, bolt together, rims, seem to lack the bead lock feature, no inner doghhnut or band. But the flat can't get pulled off the rims, since they are not drop-center.



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