Wheel balance wobble?
 

So I just changed wheels and tires on my xj with some that I bought off of another guy. I don't know if they've been balanced but I put em on. When I am on the road everything feels fine up until about 55 mph when my wheels start shaking as if they are going into a death wobble. It starts off really mild then gets worse as I speed up. I haven't pushed it to see if it goes away at a certain speed. All this is happening after I just fixed all my actual death wobble issues. Bumps are not a problem for me anymore at any speed it's just this specific speed (55mph) that's killing me.

yes the tires that I put on are bigger.

I was wondering if yall think this is likely a balance issue or maybe a driveshaft angle thing?

Balance