Oh wow!!! That must be something they've just changed with the two rear wheels on the Ecolawn 200. I know I got one of the 1st one's, so it must be an update.
I haven't had any problems with the single rear wheel. I did get tubes installed in both the two front wheels. It had a slow leak in one of the tires...so once I got the tubes installed....that has eliminated that problem.
With the single rear wheel I've never had a problem with the machine wanting to tip over. And I only fill the hopper to the top....and don't try to overload it when I'm spreading.
Plus, I usually charge the customer per hopper. This also helps me keep track of how far I am spread a cubic yard = 3 hopper fulls.
But having two rear wheels would help keep the machine more stable....but I haven't had any problems with the single rear wheel.
Good luck and I think you will like your new Ecolawn 200 a lot!!! And as long as you can get a good supply of compost....you've gotten yourself into a nice niche market.
2013 Ford F450 Super Duty Truck
2010 Exmark Lazer Z 60" deck
2012 ExMark 30" Riding Aerator
2011 John Deere Pro Gator 2020a
2011 Lawn Solution Dual Hyrdo Aerator 24"
2011 Echo Handheld (trimmers to power pruners)
2007 Big Tex 4ft metal high side 7' x 12' Trailer
2012 PJ 7' x 16' Dump Trailer
2014 Vintage 8.5' x 24' Enclosed Trailer
2012 Ecolawn Applicator model 200 Compost Spreader