Show and explain what is the largest tires that can be fitted onto stock vehicles of the major vehicle brands.  No major cutting or torching just simple, small modifications or grinding for us guys who can't afford lifts and 38" tires.  Explain why a certain tire size,( i.e: wheel travel and turning radius over uneven terrain), is the max for the specified vehicle.  Select vehicles that are old, new, and in between.  Personally I am curious about my 80' Chevy K10(hence the user name).  People have mixed opinions and it would be nice to clear the air a little.  Thanks!  

I believe I answered this for you on 4wheeloffroad site a while back.

On you 1980 K10 if you have stock hight (no suspension lift or body lift) 33 x 9.50 / 15 will clear with no rubbing at all, (that is what I have on my 1989 Suburan on the factory aluminum wheels).  If you want to go 33 x 10.50 /15 on 8" wide rims, you might have to trim just a little in the lower corners of the wheel opening on the front fenders.  If you want to run 33x12.50/15 on 10" wide rims, you will definately have to trim the lower corners of the front fenders.  If you want to trim the fenders a lot more you could fit 35x12.50/15, and that is realistically the biggest you should go with 1/2 ton axles.  The rear fenders will clear 35" tires with no trimming.  

33" on a 3/4 ton dodge  

GM1tonoffun, I know you did and I appreciate the info.  But I can't be the only person out there that can't afford a lift and huge tires.  Most of the guys I wheel with can't afford lifts or don't want to put a lift on because they have to wheel with their dd.  I just thought that this could be some info that quite a few people could use.  There are many opinions for what fits on what, and like I posted in the topic thread, I thought that Four Wheeler could provide some insite.