I measured mine from the spindle center to the fender lip. Measuring tires is ok, if they all ran the same tires.

I had 285x75R16s on mine, and they rubbed at 1/2 lock or so on the back of the plastic fender liner, so I started looking for a solution. Almost got it with the SuperCoils, as the tires barely rubbed... . I'd have to look in the owner's manual to see what the exact difference was. I know that the white dragon would take a corner 10-15mph faster than it ever did. The rear would drift before the front would start to roll!! Anyway, I think it went from 19. 5 to 22 from the spindle to fender lip, but that's off the top of my head, so don't hold me too that. I sold that truck to a guy down the road, so I'll have to call him to get the measurements. I've installed and sold several sets of the 2wd, and anyone I've talked to has been really happy with them..... I've had some complaints against the 4wd springs making them ride rough, but they forget I mentioned that when I sold them... . and they didn't want to go with new shocks, as I suggested, so I'm not sure the blame is all mine. I offered the guy new factory springs if he'd just shut up, but he didn't take me up on it, so I guess he just likes to complain... .
Anyway, I'm sure you can tell how much I think of them. I think if you're going to install a replacement front bumper, they're the only way to go.