been searching forums and haven't found too many definitive answers, i have 2007 2500 megacab wth 2 inch leveling kit and 20 by 8 inch kmc rockstar wheels, current tires are about 32-33 inch give or take. can i upgrade to 37 x 12.5 x 20? thanks for your help

 

Definitely not with a 2" lift. Id say you need another 5" of lift....but thats a bit of a guess.

 

295/60 20s on Centerline Wilderness Bullets (stock backspacing) supposedly measure 34.8" new and they just barely fit a 3" lift with the lower control arm eccentrics full forward. There's a very slight rub near full steering lock on the lower rear of the OEM flare plastic corner. I'm going to install the longer Thuren arms at some point to alleviate this minor issue, when funding permits.

http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_46.JPG

That pic was taken before I installed the OEM flares and as you can see, they just cleared the little rubber mud flap that was on there before by about 1/4".

Remember the wheel/tire combo is going to affect the results with non-fitment causing rubbing at either the control arms and/or the fender corner, depending. If you get super wide tires with the hot wheels-look offset you will need alot of lift like Dr. Evil says.

 

2" lift is good for 35" tires max

 

thats why i love this place, clear answers backed up with real world facts and figures.

I had previously seen very sporadic (1 or 2) posts around the internet claiming 35's on stock, and at least one 37 inch claim with the leveling kit, but not enough to make me comfortable pullin the trigger on 400 dollar tires.

And I know once you start turning and moving that suspension what looks like "plenty of room" standing next to the truck can quickly become a problem.

Thank you all for your input, I think I shall shoot for the 35's until my budget allows for my dream lift.

 

thats the combo we got on my dads 06 and i dont think you could clear any more tire than that

 

37" tires will require a 6" lift or more. I have 35" tires on a 6 inch lift and they have way more than enough room. Im sure 37" would fit but no bigger. Good luck with it!

 

If imnot mistaken but didnt longhorn run 37's on his at one point with longer control arms on the front and a leveling kit?

 

I dont think so. 35's and smaller I believe is what he had.

 

Also, keep in mind the size of lift depends on what you do with your truck. if its a highway queen or grocery getter you can likely get away with a smaller lift - but if you actually use it offroad (which i assume you will since you live in Alaska) your going to want a good deal more clearance between those big tires and the sheetmetal.