Wheel and tire fitment advice

[J Roc]

Good afternoon, 

I’m new to the truck world so these questions may come across very easy to some and annoying to others. However, I have searched through the forums and have found lots of information either contradicting what I’m trying to do to fit these wheels and tires and some information supporting it. 
 Any information or advice would be greatly appreciated. I’m looking at the cooper at3/xlt in a 305/55r20 size. The wheel is 20x9 -12 4.5 backspace (6x139.7 obviously). 
Now I know that this size tire won’t fit a stock truck with stock wheels. My next question is does my truck have leveling kit? I  bought this truck used. The front measures from centre of the Wheel to top of the wheel well at 24” I’m under the impression this is a 2” spacer there? 
I know this is a lot of questions in one post, but I’m really in need of new tires and want to purchase some wheels as well. Thanks in advance for all the help! 
cheers,

Jeremy 

[J Roc]

bump*

[dieselfan1]

What's the measurement from the ground to the fender. Should be around 36 1/2" - 37"

Those tires are 33.2" tall and 12" wide so they will never fit without at least a 2" level kit.

Here's a good place to check for fitment. Probably the cheapest place to buy wheels and tires on the www

 

www.customwheeloffset.com

Go to the gallery and enter your info and see what fits.

[J Roc]

Hey man! 
Thanks for the reply!

looks like from drive way to under the wheel well at the back is 40 3/8 and the front is at 39 1/4 

[dieselfan1]

You have a level kit already according to your numbers.

Those should work.

Both these fit but have slight rub at full turn.

[ftwhite]

I have a level kit (39.5" ground to fender), and fit 33.2 x 10.8 (275/70 r18) with no rub, and only had slight rub with 34.3 x 11.6 (295/70r18).

BUT - my wheel offset is +1. If you go -12 (from +24 stock), PLUS 12" wide tires, you are pushing out into the fender lip way more than me, so....

 customwheeloffset.com is a great reference. I also like https://tiresize.com/wheel-offset-calculator/

[dieselfan1]

9 minutes ago, ftwhite said:

also like https://tiresize.com/wheel-offset-calculator/

That is also excellent reference info. Explains offset differences with accurate diagrams.