What size tires and rims to get?

Wrong forum....I'll repost in the garage area.

Hi everyone, new to the forum and need some advice from the group please.

I just purchased a 1991 extended cab. The truck came with a 4" lift kit along with 35x12.50R15LT 113Q M+S tires which I feel that the truck is almost straining to turn them over along with making it a rough ride. In short, I'd like to downsize on the tires but not quite sure what size to go to. I will mostly be using the truck to run around town in and pulling my jon boat to the river. Won't be doing any off roading or mudding.

Any suggestions on tire and rim sizes would be appreciated.

Thanks in advance,
Griff