Here are 33x12.5s on my leaf spring Raider, no lift, no torsion bar cranking. I've trimmed out the splash guard in the front wheel well and the bumper end caps. Picture above has no bumpers, but you'll get the idea. The wheels are 15x8 with 4" backspace.

I guess I will post up my reference picture too.

Mark's Gold Raider: 32x11.5 BFG A/T on Stock Steel 15x6, T-Bar crank in the front.
My Red Raider: 33.7"x12.5" Swamper TSL on 15x8 with 3.75BS, no t-bar crank, trimmed bumper end caps and wheel well hammering.

And for reference with 2" body- and 2" suspension-lifts:



33x12.5s on 15x8 rims. They look tiny compared to the others. <img src="/forums/images/graemlins/lol.gif" alt="" />

Ya'll should see that truck in person.

<img src="/forums/images/graemlins/patriot.gif" alt="" />

I have. Got to see a poor elderly guy do somersaults in his car on I-70 while riding in it. <img src="/forums/images/graemlins/frown.gif" alt="" /> Luckily only minor scratches for him.

<img src="/forums/images/graemlins/kewl.gif" alt="" />

I-70 is a ***** especially in the winter!

That truck is a sight to behold! <img src="/forums/images/graemlins/cheers.gif" alt="" />

My experiance was similar in that wider rims did help reduce rolling rsistance, and switching over to aluminum rims reduces the weight penalty of going to larger tires but I found it was a much smaller effect compared to the change in effective gearing.

Also its hard to get a set of large tires that have low rolling resistance, I really wish the rolling resistance was publised.

My Raider is due for a new set of tires and I would like to make as good a choice as possible (I'm going with 31x10.5'x15"). I have cosidered using another set of BFG AT's. My set are the pre KO version, I am curious how much better the KO's are?

In my experiance the BFG's are a great off road street tire but not so good in the snow. I want better snow performance and lower rolling resistance than what I currently have.

Getting back on track.....

When you go to larger, wider tires; reducing the camber angle to as close to 0? helps to reduce rolling resistance and promotes longer tire life.

Kevin C

Kevin,

FWIW I have three sets of KOs in service. I just sold my Tacoma with 31x10.50x15s. They were from 2004 and showed minimal wear with over 30k. Snow performance was fine in my locked Tacoma TRD.

I have a set on my open rear 4.10s V6 Ranger and it gets a bit squirrely in the snow... But it has about 250 ft lbs of torque. They have about 45k on them and have worn well even with my foot constantly in it.

HTH, Jason

@ Kevin, The BFG A/T KO's come meet the industry's severe snow service requirements (and are branded with the mountain/snowflake symbol). So they should be good in snow if their little ratings mean anything.

On-topic I will say best of luck in your transition to 31"s. I would say go bigger, fallowing the truth that after a while 31"s start to look small. But for some 31"s are plenty big, so hopefully they will suit your needs well. <img src="/forums/images/graemlins/kewl.gif" alt="" />