I just picked up a 99 Sonoma SLS 4x4 ext cab.
I'm in the market of getting something more beefy.

My question is will these work for me, without any need for a lift kit?

31X10.5 - 15 BF Goodrich all terrain KO on 2nd gen S10 4x4 Rims.

I have a set of aftermarket rims mount already, but was thinking these would make a good backup/ winter set.

This is my 1st post about my 1st truck.
I've had SUV's before but never owned a truck.
Thanks in advance for any info.

 

Here's what she looked like the day in picked her up.
(2 days ago)

 

One more shot.

 

they will fit but you will be rubbing the fenders and frame you can tweak the tors bars 1.5" and shackles and add a leaf in rear and rub wont be nearly as bad

 

I'm running 17's with P245/65R17 105T right now without rubbing.
Trying to find out how to tell if these are 30's,31's,etc?

Thanks for the input trobbins

 

those would be more of 30" a 31" would be more of a 265 or 285

 

Thanks again Trobinns.
Is there a formula I can use to figure this out?

 

google

 

Lol!
You'd think in a forum full of "self proclaimed" s10/blazer/s15/jimmy experts someone would know this answer.
128 views, & you're the only none to chime in...

Thanks trobbins.

 

It's not that us "self proclaimed" experts don't have an answer its more that the answer has already been answered a million and 12 times and would have been answered for you if you would have tried a search! Most of us don't like to repeat it a million times you just got lucky with trobs responding cause he's a good guy and helps out everyone even if its repetitive questions from what I've seen of his posts!

As for your answer you will more than likely need to trim your fenders a bit to prevent rubbing. Or you can do the shackle and tbar crank lift and that might get you enough room. I will say I like the look of your truck with the wheels on it now and the two tone and I usually don't like bigger rims on a 4x4 but it looks good man!