Will this tire affect my speedo or anything else?

[new man]

I am looking at getting Goodyear Wrangler AT/S's put on my truck. They make them for an 18 inch wheel (Ford FX4) but the size they offer is slightly different than what I have on my 2005 SE, CC, big tow, 4x4. They are a 275/65/R18, compared to my 265/70/R18's. Will the AT/S fit my wheel without any modifications, or rubbing? And if so how far off will this put my speedo if any? Will it affect trans shift points? Is this tire taller, wider, smaller than what I have now?

[92TripleBlack]

You'd be off by 1 mph. The tires you are looking at are smaller than stock. As such, you would not experience any rubbing.
Any reason you are going for these instead of the BFG A/Ts in 285/65/18, which are the same diameter as stock?

[new man]

92tripleblack, I am looking at the Goodyear for a little softer ride, and not quite as aggresive as the Bf Goodrich AT's. I had a set of the BF's a few years ago and after everything (good) I heard from folks who had them I was not impressed. I had alot of vibration at highway speeds. I had my truck in the alignment shop, rotated and balanced and still had vibration. I want a good highway tire with a little more inclement wheather grip than the SR/A's. Have you or anyone else seen a titan with the AT/S's on them? Is the size difference enough to where you notice, and looks dumb? These things are like $240 each!!!!! WOW!!! I have a freind who has them on an '05' f-150 and they look great.

[Titan1080]

$240 a piece?!? Dang, why are they that expensive? I got a deal on my BFG MTs for $198. I'm going to check out GYs site since I'm not familiar with those tires.

[Titan1080]

Oh, 18" rims. That would be the reason.