All the epoxy does is seal the rivets. Just about any clear epoxy will work. Clean and warm the area. Mix and apply. The warming allows the epoxy to thin and flow. It also speeds the "set" time up. Paint if you would like(not a bad idea). 215-85 on those narrow wheels(4.5) sounds about right. My rims were a bit wider so I could use the 235 on them. And, yes at a full stop they are hard to turn. Truck tires at 65 PSI but as soon as the truck moves(and I do mean as soon as it moves) they turn with one hand on the wheel. So I am happy. The side walls are not pulled in at the rim. Nice tall and straight up. About as big and tall as will fit. 15 inch wheels so I was looking at a bit different combination. So far the combination works well. No leaks and no issues with rubbing or touching under the fenders. There might be an issue with OEM tie rod ends..but I have the smaller replacement type on my truck. Not a lot of room between the bed and the tire, but no rubbing on that spot either. The tire guy did say I might get some road noise from the more aggressive tread on all 4 wheels...I smiled and drove away. Road noise? That is what the radio is for.

Steve H