I had the same problem, when I got new rims.
The space idea would work, but you ar putting different loads onto the lug bolts. I finally found rims with a deeper offset and have no more problems.
Yesterday was the test. I hauled two loads each
1790 kg- apox 3400 lb of gravel and the truck run and drove beautifull.


Fritz Peyerl
Turner valley, Alberta
http://www.badmileage.com