I run 35x12.50x17" pro comp XAT's on stock rims with stock suspension, and have no clearance problems, but my truck doesn't really see offroad much. I do have a slight rub at full lock on the control arms though, but that's because of the stock wheel's backspacing, and not the height of the tire.
Scott

I'm running 315/70-17 Goodyear Extreme AT's on stock wheels and suspension w/o any problems other than the slight rub on the control arms. I don't "wheel" my truck but I do use it in and out of hay fields, etc. Never have rubbed the fenders or wheelwell liners, plus I have the Dodge mudflaps and they have never had a mark from the tires. There are several guys running 37's w/o any lift and some w/ 2" leveling lits on Dodge Cummins Diesel Forum . They are a tight fit but appearently it works.

So you're saying if you ran 34 inch tires on the same stock wheels and they didn't rub, that would be because of the backspacing, not the tire size? :humm:

I have been running 315/70/17's (34.5x12) BFG's on my last two trucks without any issues other than a little rub on the control arms. I started running them on stock suspension and now run a leveling kit. Just recently purchased 325/70/17 (35x13.12) Nitto's and they are about as tall as I think you can run without having any big rub issues.

PM elephantrider.... hes running a 17x8 or 9 with some 37's and a leveling kit...

i know he rubs on the control arms, but not positive about the fenders...

if you run the stock wheels you can clear 37 stock. it has been done. there is an active post on another board with pics of it done...

Yeah, as long as the roads you drive on are pretty straight and lead right up to an intertate entrance and you park on the street, I suppse you could get away with it. :lol88:

I disagree about the tires and lift. Level kit should be more than enough to clear most 37" tire.

Here is a 05 CTD 4 door, long bed with 37" claws on stock steel wheels. They fit and only slightly rub the control arms at full lock, nothing that effects drivability at all. I would venture guess that about 3-5* of steering was lost. the only mod was the removal of the front after market flares. The truck was fitted with the after market bumper at purchase, so there might be interference with a factory bumper, but I can not attest to that.

Now to add, I am not a fan of huge lifted trucks, it's just not my thing being into offroading and lots of lift pretty much equals flops and roll overs.

Attachment 49407
Attachment 49408

and here it is with a cap and about 800 lbs of equipment in the bed
http://hphotos-snc1.fbcdn.net/hs243...._2682428_n.jpg

:lol88: ...if that's your definition of "more than enough to clear."

Good memory bud...but sorry to say Doc was right...

I *tried* to run 37's on stock wheels and they rubbed all over the place. I had to install the Carli arms, then no issue, but I did go back to 35's, handled way better.

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You can disagree, but you are wrong LOL...( i mean this is a nice way)

ANY level kit on the market right now, will not clear 37's. BESIDE the control arm rub, you will definitely rub the stock bumper (in a big way), but the bigger issue is TRAVEL...the rears will hit the bump stop so not too big an issue unless the impact is real severe, but the fronts will tear the front fenders off if you bottom out...

there is a difference between 'fitting' and working....