On my '57 GMC half ton I ran a set of Michelin LT215/85R-16 take-offs for a couple of years on stock narrow rims,tubeless,with no problems. But then I hooked onto my 35 foot 5th wheel RV and left Reno for Boise Idaho,moved it several times up there then brought it back down to Elko. It took all that distance to figure it out,but 3 out of 4 of the tires separated from overloading,so I changed to E rated 235's,still on the skinny stock wheels. No problems-drives fine.
I think the refusal to install radials on the stock 4 inch wide rims is mainly a liability issue. With people as "sue-happy" as they've become,tire shops really have to be careful. I think builder has the right idea-they're not that hard to install yourself,with a couple of good tire irons and a tub of Murphys tire soap,and the tire shops shouldn't have any gripes about balancing them,since balancing is a "non-invasive procedure".
Good luck with your tire purchase,whichever way you decide to go.
Speed
