I think the main reason alot of guys don't run 34's is the sizes in certain rim choices. Like for me, I have a 16" rim and there aren't a whole lot of 34" tire choices out there, yes there are some but not alot. I have 33's on mine with 912's and I LOVE it, it rides great, handles good still (great after the urethane sway bar bushings) and great offroad. I know Marlin has 34's on his rig (I'm sure he'll chime in when he see's this) and he's running the Goodyears too. Here's a post from him about the tires:

Quote Originally Posted by Marlin View Post
Update on the kevlars. Performance was awesome on the trail, zero problems.
I pressure washed the truck today, noticed the tires looked funny. In order for white lettering, they paint the outside white, then put black over that, and shave off the outer part on the lettering, voila, white letters. Well, my black layer is coming off, so I will end up with a whole white wall. Boo!!! So I called Goodyear, they told me to take it in. I finally found an actual Goodyear store. They are ordering me four brand new ones, no charge. They said it will be a few months. Woo Hoo! I am driving around on free rubber!! I used 1/32" in 1000 miles. Not bad. The guy at the shop was not friendly at all, and kept trying to get out of it. He was like "its gonna be months, do you still wanna do it?" The longer it takes the better, as far as I am concerned.
SO I guess I just have to keep them covered in mud
He commented that there were rub marks and some nicks in the sidewall, so it might not be covered. I asked him to take a look at his own site, that is what the tire was built for, hence the 1" thick sidewall. LOL, what a tool.


Quote Originally Posted by Marlin View Post
I just got my new Kevlars installed. The manager proceeded to lecture me on the use of my tires,saying it was obvious that the sidewalls had contacted rocks and other sharp surfaces...duh!!! I told him, "no ****, thats what those tires and my truck were made for". He was not amused, he seemed disappointed that Goodyear offered to replace my tires for free, I didn't pay a single dime. They did not wear well either, 1/8" off of the front an 1/16" off the rear in less than 2K miles. I also managed to tear off a few of the outer lugs. They handle awesome, and are very quiet, and are killer in mud and on rocks. But based on wear and cosmetic issues, i would not buy these again. The new tires are slightly different, so hopefully Goodyear fixed their QA problems on the cosmetic black coating and the softness of the rubber. I will post up in a few months if they do the same thing as my first set.
On the RS I am putting some Swamper TSL Bias Ply tires. Those things are indestructible and much cheaper than the Kevlars. I could buy 5 for less than I bought 4 Kevlars.
In all honesty, I think you'll be happy with either size. Chris (Marlin) was running 33's before the 34's and alot of guys are running 32's as well. I love the way my VX sits and rides. Whenever I need new tires I'll probably end up with 34x12.50 TrXus MT's or some 34" TSL's (either the 9.50 narrow's or the 10.50 LTB's). By then I'll probably have a new daily anyways. You should look into a diff drop to help with your CV angles to make your shafts last longer, do a balljoint flip and possibly a spacer depending on how high you crank the t-bars, and you should be fine. I myself really like the look of my 285's (33x11.50) on the VX, not too wide, not too skinny. Just remember, the wider you go, the more trimming/hammering you'll have to do especially with a 0 offset.