How Close is too Close Wheel to Knuckle/UCA

Howdy,
I got a sweet deal not too long ago on a set of 285/75 r16 wrangler duratracs on stock 3rd gen 4runner 5star rims. I've been driving the truck around town, but I'm hesitant to take it wheeling or camping or anything off road because of the distance from the tire to the knuckle and the UCA. Wondering if y'all can tell me how close it too close....

Thinking about going 1.25" Spidertraxx to create more space but I'm worried that I'll have to trim the crap out of my wheel well. They are too rad to get rid of... Thanks!

 

Great question! Ive got 285/75r16 KO2's and the same 4Runner wheels. Next on the list is a 2-1/2" set of Kings or Foxs w/ some UCA's, rear shocks/Springs so Ill most likely come across the same problem. I have stock coilovers right now with a cheap 2-1/2" spacer lift on my coilovers (came with the truck) the wheels are just too damn sexy to go with another set up. I'd possibly consider a set of Ivan Stuart wheels but they just don't look as good as the 4Runner rims IMO. I was also considering a wheel spacer because I rub my frame but I travel a lot and don't want to wear out my bearings

 

Spacers might help. I wheeled for years on my 33" MTRs that were about that close. No issues, although it did rub slightly a couple times. Only could tell from mud being rubbed off when off-road. No wear issues whatsoever.

 

Air down slowly and see at what point, if any, the tire rubs with the knuckle.
These one-inch are in the seller's section: https://www.tacomaworld.com/threads/wheel-spacers.483022/

 

Thanks fellas