Ok, I've researched so much my head is spinning. I've decided to go with the Terra Grapplers but now I can't decide if I should go 285/65/18 or 275/70/18 on a stock (rim and suspension) '05 4x4 Lariat SuperCab. I want a little more height, but still must be able to fit in a 6'5" parking deck which is why I'm not putting a leveler on it. Thoughts?

When I have the Ford dealer recalibrate the speedo and everything, will they be able to do that for both these sizes?

 

Tire size: 285/65-18 - 275/70-18

Section width: 11.2'' - 10.8''

Tire diameter: 32.6'' - 33.2''

I believe ford can do for both, but I'm not 100% certain.

 

I'd go with the 285's.