Why won't these wheels work on my '98 Jimmy
 

I wanted to get a set of these on my 4x4 Jimmy, but eBay said the wheels won't work. I was curious why they wouldn't work

18" IROC18X8 5 Black Machined 5 Lug 5x120 7 Wheels Impala Camaro Rims Set Irocs | eBay

Probably because of the backspacing, they will stick out ~2" further than stock wheels.

those have good backspacing for a 4x4. Unless they are too wide i cant see a reason why they wouldnt work. Maybe because of the hub

According to their fitment guide they wouldn't fit any era Camaro I tried.... They should fit, but, will certainly push the tires out.