First things first, the final setup on my build will be a rear axle from my 93 4x4 and a front from an 85, 5.29s, dual cases (2.28/4.7), 22re, etc.
I know most people say that the largest tire you should run on a toy axle/22re is a 35. So, I’ve been looking around to see what tire I should get. But my thought was it’s gotta be more based on weight and not diameter. I looked on Interco’s site, and found the following.
TSL BIAS 36x12.50r15 = 65 lbs
TSL radial 36x12.50r15 =67
TSL SX 36x12.50r15 =72
TSL SX 38x12.50r15 =84
LTB 35x12.50r15 = 67
LTB 34x10.50r15 =58
SSR 35x10.50r15 = 70
Bogger 38x11.00r15 = 71

If it’s not obvious, I like narrow tires. So, my thought is I could run that narrow 38in bogger, and only be pushing a couple more pounds per tire than most of the 35x12.50s out there. My point is that I could run a larger diameter tire, just as long as it’s narrow, due to the fact that it doesn’t weigh that much more. I tired looking on some other manufacture’s sites but couldn’t find much more info in terms of weights. Should I even bother with trying to get the 38x11.00? Or am I just blowing smoke?

weight dosnt matter to much. the the contact point to axle center that will kill the axles.

While weight isn't totally irrelevant, it matters far less than diameter.

Axles normally break because of too much added leverage. This is mostly a function of tire diameter.
Unless you've got upgraded shafts in your axle I wouldn't go over 35" no matter how narrow or light the tire may be.

ahhhh. good to know. thanks guys. 35s it is....

I would say a 35X15.50 on a wide rim is going to be WAY harder on your birfields than a 36X12.50 on a narrow rim.

That said, one of the best tires for mini-trucks around here seems to be the Q78 TSL. They actually outperform 36 AND 38X12.50's in deep mud and are just a HAIR shorter than the 36's. I put a set on my V8 Toyota in 1999 & have loved them ever since (swapped to 35X10.50 Boggers on the rear this past year, but they're 3/4" shorter). I'd give 'em a look.


TEX

Oh, and for reference, my Q78's on 7" rims in brand new condition were checked using a rigid 35.0" caliper held horizontally on the tires. These tires come out to EXACTLY 35" diameter with 15lbs of air.

What is the width on those Q78's?

Q78 is basically a 35.5X11. Not the exact measurements, but should give you some reference compared to other tires. Best part, 27/32's tread depth :smokin:

Where did you see that 35's were what everyone says? Doesn't seem like you would find that around here. I run 36 Iroks and have the smallest tires in my club! Hell, most of the other guys have left the 37's behind and gone to 39.5's.

I would consider some other factors. You gonna run Longfields, or even Dirty 30's? What kind of wheeling will you do? Daily driving also? (bigger tires will make it slow on the street). Are they gonna fit? You willing to trim fenders and tub the firewall for clearance?

Lets have some more details on what you plan to do with this thing.

[QUOTE=EarlKann;9394284] Where did you see that 35's were what everyone says? [QUOTE]

I'm not going to dig up thread after thread to find quotes, but most of what I read hear, read in mags and hear from others is that for my setup I should not go much over a 35. Again, my build will be my 93 shortbed, 5.29s, dual cases, lockers, pretty much stock 22re, etc. For now, I do not plan on getting longs or dirty30s. I figured I'd test my limits and when my shafts/birfs break I'll know my limits and where I can go from there.
As far as fit goes...I have not swapped the IFS yet or lifted the rear yet, so I can fit what ever size I want, as soon as I decide what size I'm going to run. I don't mind trimming fenders, but I'd like it to retain it's look/dignity (I bought this truck when I was 15 and I'm finally saving the money to build it like it deserves:)). It's not going to be a trailered truck, It's my DD and even though I ride my bike to work, store, etc. This is my only vehicle. It'll see trails on weekends over the season months as well as some snow fun in the winter, but it'll also see quite a bit of highway...

If I were gonna run stock shafts then none of those tires would not be in my choices. I have run 35 Bfg's, 36 Tsl's, 37 Pitbull Rockers and now 38sx's. Yeah there may not be a big weight diff. in some of the radials vs. bias swampers but the swampers are gonna pull harder than any radial mud terrain you get. I would stick with say a Km2 or any mud terrain less than a swamper. Your gonna do a sas and all that work just to run stock shafts, the first time you bind up pretty good and have no other choice than to give it a little gas its gone break. Been there done that and you say its your DD, break a birfield and try and drive it home and let the broken parts bind up. Life is gonna get bad and maybe ruin your housin, done that also.

You said "build it like it deserves". Get longs then or save till ya can.

good advice. I will def. reconsider longs.

In my first post I wasn't trying to limit my tire choices to just that list.... I was simply asking the question of weight vs. diameter. I'm still heavily considering a KM2 or an MTR.

I debated over tires for ever before making my mind up, unless you do alot of mud stay away from the bogger they suck ass, I don't think I will run anything but an Sx swamper from now on. I would cut corners on anything I could even If I could only afford the 27 spline long. I prob broke 3 stockers running 36 Tsl's. I have a 4.3vortec, th350 and dual cases with 5.29's, I absolutly babied it and it would suck big time knowin that if you even thought about pushin the gas it was gonna break. With Longs i'm runnin 38's and lettin my motor eat with confidence. I have no worries.

Get 38x12.50 TSLs if you like skinny leave the front open till you can afford to up grade the front. It will prob go further than you want to go, and it will not be very risky on breakage open.

Q-78 buckshots are BADASS tires.

This might be dumb but what exactly does the Q-78 stand for? It does sound like a good sized tire...

I say 44" it is just how much you whant to spend.
I ran 44" in the snow and 38" in the rocks.
I had 30 spline hp ARB 9/16 studs full hydro.
I should have just built a 60 with all the money I spent.

toyota are fine with 35s and seem pretty good up to 37s depending on how heavy ur rig is. . .. but before u buy longs or go any bigger on tires take a good long look at just going 1ton.

I have seen guys run 38's all the time with longfields

This might be dumb but what exactly does the Q-78 stand for? It does sound like a good sized tire...

A 78-series tire has a sidewall height whose measurement is 78% of that of the section width