I've noticed many threads/posts about what size tires will fit my....(insert your model here)
and frankly I'm fed up of seeing the same questions repeated over and over.
So I've decided to start a thread to help make an informed decision about what size/type of tires and wheels go together and such.
If you have any more info to add,please do,but make sure it's accurate and safe.

Tire Size Calculator-clicking here will link you to a site where you can convert and test out different tire sizes

The tire height you can use on your Jeep without rubbing is determined by lift height, bumpstop length, and other body modifications such as trimming, high-clearance fenders, etc.

The tire width you can use on your Jeep is determined by the backspacing of the wheel. most stock Jeep wheels have backspacing ranging from 5"-5.5".

Here is a chart I found that is a good guide to use as a rule of thumb for fitting tires with the above mentioned wheel spacing


and a backspacing chart


BFG off road tire tool

Sidewall Info Tool

Off-road traction is all about maximizing your tires' contact pressure, which is largely a function of tread void ratio, or the ratio of rubber tread blocks to the open space between them. A high void ratio will put more of the vehicle weight on a smaller amount of rubber, increasing the contact pressure. A larger tire with the same tread will decrease contact pressure, although the void ratio remains the same. Similarly, a lighter vehicle will have less contact pressure than a heavier one using the same tire.

Here are some general rules to keep in mind.

For sand, size is everything. The wider (not necessarily taller) the tire, the better the flotation, and the idea in sand is to stay on top. Little or no tread works fine in sand, and the rounder the tires' shoulders, the better. Also, the less void and the more rubber, the better. Vehicles with a lot of power can run tires with seriously aggressive tread.

For mud, tire bite and power availability should be matched. Light vehicles can benefit from wide tires, allowing them to float over the worst, while heavy rigs may be better off with skinnies that can find traction beneath the muck. Either way, the taller the tire (if there's power to turn it) and the more void, the better, because height keeps the drivetrain from hanging up in the goo.

 

Thanks again Beserkur. Most tire shops around here say you order them YOU KEEP them. I would love to find a set that gets the "HOLYF*(K FACTOR" on mine. Would go more than 35's.....unless I get a taller wife......lol

 

great info ! thanks