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What size tires for my 90 XJ

New tires, 31 or 33?

2K views 9 replies 4 participants last post by  SLADE 
#1 ·
Happy Saturday JEEPForum!! :cheers2::cheers::2thumbsup:

Its time for new tires on the jeep. My rear tires are down to about 1/8th inch left and that isnt enough for me to be happy in the mud. I drive a 1990 XJ 4.5" lift currently rolling 31 1050 15 Discoverer STT (old tread style)


I drive her just about everyday just a few miles. I go back and forth between my car and the XJ. Everyday that i do drive it, I get her dirty. SO my tires need to perform. I primarily mud, dont have too much experience with rocks but I just moved here form Florida so this is my first summer up north, who knows where it will take me

On memorial day I will be driving about 150 miles south to the family farm with my wife and 6mo daughter. I will have at the least 2 new tires on there and this is where you guys come in;

1. Can I buy 2 new tires and leave my Coopers up front without some funky vibrations or harsh wear?
b. How bad would it be if the back 2 were 33 and the front 31? How would they wear over that drive and for about 2 weeks after until I bought the other pair?

2. My jeep didnt come with a spare so I will be keeping one of thet ires on the rim and mount in the back. (This means Im thinking of some cheep black rims but Im not sure what my backspacing is... ideas?)

I can either buy 4 tires at once, or 2 tires, 2 rims and new shocks all around before this trip. I would like to do 2 and everything else if possible

Can I Have your opinion of the below brands? My Budget is about 200 per tire. Some cross that line but they look worth it.

Hercules 31" $170 http://www.ebay.com/itm/360609508750?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648

General grabber AT2 $167 31"33x12 $196 http://www.ebay.com/itm/360629555123?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

Duratrac 31" $184 33" $189 http://www.ebay.com/itm/310498373533?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648

Dynapro MT 31 $193 33" $223 http://www.ebay.com/itm/310498374010?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648

BFG KM2 31x10.50 $215

Kuhmo Venture 31" $213 33" $229http://www.ebay.com/itm/310498377258?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648

Wrangler Kevlar 31" $216 32x11.5 $226 33x10.50" $217 http://www.ebay.com/itm/310498377431?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648

:cheers2:
 
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#3 ·
I have the BFG KM2. Love them offroad in dirt and mud but I don't like them on pavement. They feel a little squirrely on the rare occasions when I go on pavement, especially in rain (no sipes). They are also pretty loud. Those drawbacks will be mitigated a bit in your XJ versus my TJ, just due to the longer wheelbase, so you might want to hear from a long wheelbase guy instead. Around me, all the pickup truck guys have them in the 32 to 35 sizes and swear by them for their long, heavy vehicles.
 
#4 ·
If go to 33s, the on-road driving characteristics will change significantly (acceleration, braking, cornering) all of which will degrade. Of course you will gain in the off road capability department. Going to 33s you might want to consider re-gearing to gain back some of what you'll lose going to a larger tire too.
 
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