36 > 32h for strength
wider > thinner for rims' strenth, maybe attempting at least half tire width with rim width? Thinking through 4x4's to racecars to dirbikes and sportbikes there are trends that are applicable, depending on what you want to do, with good medians.
I'm really happy with price/strength of alex 32mm 36h rims and up to 2.35-2.4" tires. I wouldn't be afraid to try 2.75" if they fit the bike.