Paul,
When we bought our current trailer I took all the tires off, had them balanced (the trailer had miles from the factory to the dealership and then to our house) with about 600 miles on them. One took a tad over 4oz of weight to balance. The tire shop wanted me to buy a new tire as they said nothing that out of balance would ever work right. We've got probably 15,000 miles on the RV now and other than rotate front to back every spring when I repack the bearings, all four tires are still doing well. I'm convinced that balancing them not only prevents wobble in the bearings and helps keep the brakes intact, I also believe that a tire bouncing down the highway "jittering" itself with every rotation is a tire that's not going to make it very far. Reducing that hopping, I think, helps preserve the tires and suspension.
I think it's probably one of the best $25 investments in RV maintenance.
Now, just to pull your leg a tad...... I've heard of "screw in light bulbs" "Screw in Plugs" even "screw in air fresheners", but I've never heard of "screw in tires"
Smile: It's all good
f6bits: When I do my annual tire rotation, wheelbearing packs and brake maintenance/adjustment, I loosen all the lug nuts, jack up each axle, slip a jackstand under it and move to the next wheel. Once they are all on jackstands, I remove the wheels, do the bearings, brakes, etc, then install the wheels again. Having the jackstands makes it so much easier. You can get 3 ton steel jackstands at Harbor Freight for $25 a pair, often they are even cheaper. I can't imagine my shop without those jackstands, they come in handy for everything from lawn mowers, ATV's, tractors and even cars, trucks and trailers
With them, you can get all 4 tires to the tire shop at once.