Do aftermarket rims with more offset put more
Stress on the ball joints?

 

honestly, not enough to really matter.

 

yes they do, but how much depends on how heavy the wheel and tire set is, and how much offset the wheels have. that said, many people do it, and they should still last a long time.

 

The simple answer is yes. It increases the load on the wheel bearings, too.

I think the OEM ball joints and bearings are just as likely to fail early with the stock wheels and tires, though.

 

So should any other modification be done just going from a stock 32 rim/tire set up to a 33 with aftermarket rim thanks

 

I would just run the OEM parts until they fail, then install better parts. Some of the vendors on this site sell upgraded ball joints.
I don't think there is an upgrade for the unit bearing hubs. I found some Timken hubs, but they are made by the same overseas factory as the OEM. The Timken hubs I found have a lifetime warranty.

 

Your ball joints will wear out. The stock ball joints are pure junk and should be recalled in my opinion. My ball joints were wore out and I replaced them before I had 20,000 miles on it. This was on stock wheels, tires and suspension. When I went to replace them the OEM Jeep replacements only have a 2 year/1200 mile warranty. That's right 1200 miles.
Find a good set of greasable ball joints when you have to replace yours.

 

I am on 35's and at 45k miles on my original ball joints. I wheel moderately. They are still going good!

 

I had to replace my stock ball joints, in my 2011, at only 15,000 miles. I'm running heavy Toyo 35s on AEV Pintler's.

 

Its not the offset that adds stress to the ball joints, its the weight of the wheel and tire together. If youre moving up in wheel or tire size, its obvious that the weight will increase as well. This along with added stress from off roading is what makes your ball joints fail prematurely.