I have an 06 King Ranch F150 with 3 in spacers. I want to keep the stock 20in rims.

Will 36x13.5 Iroks rub my UCA?

 

doubt it

 

What art thou doubting?

 

I wouldn't try that. With the stock rims a 35x13.50 tire rubs on the UCA's, not sure about the 36x13.50. Hell 35x12.50's rub some depending on the tire.

 

i wouldnt do it, stick with a 35/12.5

 

Other members have had 35X12.5X20 m/t's on the factory 20's, and they do rub just before full lock. So a 13.5 tire will rub even more, plus the fact that you want a 36" I am guessing that will require some trimming to fit also.