What is the biggest tire size i can put on my truck, without having to get a lift kit?

I have an ’05 Dodge Ram 1500 4X4. 20" rims.
Currently have P275/60R20 tires.

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4 Responses to What is the biggest tire size i can put on my truck, without having to get a lift kit?

  1. Loren July 4, 2011 at 4:47 am #

    There are many factors to consider, wheel back spacing being the main. A 305 or 33" tire is really pushing the limits. I think you should look at other factors such as driving style and normal use before making your decision. Do you go off road? If they fit at the tire store, will they fit crossing a wash? Wheel spacers are cheap and might help if your just going for looks. Loading the torsion bars a little ( not "cranking them all the way") can ease the burden of bigger tires to. Just remember, torsion bars ARE the suspension and ride quality is decreased. A sawzall and a tape line with a well planned cut helps (usually only need to trim the corner off the bumper). So, some $45 wheel spacers, a small tweak to the torsion bars (fallowed by a trip to the alignment rack), a little bumper trim, and some new "33’s and you have a tough looking capable truck. Or just got to your tire store and ask them to mount up a tire in the size you think you want and bolt it up on the front and see how she looks.

  2. Hayden July 4, 2011 at 4:47 am #

    in all honestly not much bigger with out complications, you could go up to about a 31 inch and be ok but any bigger and youll start getting rubbing when you turn the truck.

  3. Steve July 4, 2011 at 4:47 am #

    Well the tire size your running right now is just about 33 inches tall, you could go to a 34 with no lift kit and if you wanted to do just a front end level then you could probably run 35’s with no problem. Might have to do some minor cutting. A 305/60R20 for example is about a 34.5 inch tall tire.

  4. Mike Smith July 4, 2011 at 4:47 am #

    Since you have a 4×4, you can crank those front torsion bars all the way and fit 33"-35" tires with no problem, actually 33" would fit right now. On my 2wd regular cab, I had 305/45-22 tires which came out to be around 33". I did not have a level kit. I suggest 305/55R20 tires which you can put on your stock 20s. If you really wanted to, ive seen 35" tires with just a leveling kit but it was a tight fit though.