Multi piece wheels are still manufactured for tube required tires. A removable lock ring is required to mount tube required tires. Anyone who has ever changed tires will know that with truck tires the tube is placed inside the tire and then the tube is inflated to where it has no folds in it. Then the flat is placed over the tube to prevent the tube from rubbing on the rim. The tire, tube and flat is placed over the rim to where the stem can be pulled through the hold. Then the tire is slid over the rim and the lock rim installed. Tubeless tires use a one piece drop center wheel. With a little experience and a lot of lubricant and the correct tire tools a large truck tire can be pried on and off of a drop center quite easily. However it is impossible to mount a larger truck tire tire with a tube and flap in it on a one piece wheel without damaging the tube. About 50 years ago tubes were available for tubeless truck tires that had had a hole too large to patch. A tube was placed inside the tire and the stem was pulled through the hole with a valve fishing tool like was done on passenger cars with tube required tires.
https://www.miltonindustries.com/tire-hardware/valve-fishing-tool-2506This turned out to be a bad idea because when the tube was inflated inside the tire not all of the folds straightened out and tubes start leaking at the folds in a short period of time. Anyone who is old enough to remember when tube required tires were still popular, probably about half of the flats were caused by folds in the tubes. And this applies to civilian vehicles as well as military vehicles. Multi piece wheels are still available for container chassis that run 10x20 tube required tires.
http://www.chassisking.com/images/p...s-10-00-x-20-tires-on-5-spoke-wheels.jpgThe reason for tube required tires on container chassis is because they park them at sea ports and warehouse districts where crime rate is very high. And the thieves cannot sell tube type tires quickly so they don't steal them.
