Trustyrusty

I got some 33x12.5's now for my '86 and I will be running a 3" body lift, now I'm questioning what backspacing cause someone told me 2" backspacing is what I want, I was gonna go with 4" BS OR 3.75" any reccomendations? Can someone show me some 33x12.5's on 15x8's and list their backspacing? I don't want to order rims and have to send them back.. Thanks! I'm worried I'll rub the UCA and not be able to run BJ spacers later on..

76ANTHONY

looking it up i would say 3.25 would be your best bet, no trimming

SwampThing

33x12.5x15 xterrains on 15x8x3.75 stompers on my old green machine

76ANTHONY

heyyyyyyy, thats a odd lookin toyota

abecedarian

--that's the prototype 4Rammer

76ANTHONY

thats got the new 5.7 in it dont it? got one in my old azz 07 tundra, nice power engine. cant wait to see it at the la car show, i might get me one of the prototypes

Jay351

IF you don't plan on running a suspension lift. Stick with wheels with 4" backspacing. If they stick out too far you will run into rubbing issues. My 3.5" backspaced wheels make clearance an issue.

2" backspacing is only needed on a solid axle rig.

Trustyrusty

What about 3.75"? Its between that and four inches?

olharleyman

Here is mine with 35 x 12.5 and 3.75 backspacing

SwampThing

Whoops wrong picture.



Don't mind the words. Couldn't find another picture...

Pfft. Hell no. That right there is better than half a thousand ponies of coal rollin, tire roastin, stump pullin, chain yankin, deer slaying, 5.9 liters of diesel chuggin goodness.

Trustyrusty

Hey Clint did those tires rub alot? And where'd ya git em if you remember?

Trustyrusty

The RIMS that is..

Trustyrusty

Could I run a Suspension Lift with 3.75" BS? I'm debating on that one of these days...

abecedarian

superlift, rancho, etc. require 3.75" or less back spacing. so to answer your question, 3.75" will work with a lift. 4" will rub the rim on the control arm.

SwampThing

Nah, 3.75" worked dandy for mwah.

Jay351

Yes, most lifes require rims with 3.75" backspaced rims to clear the A-arm.
If you don't mind trimming get the 3.75" rims to keep your options open. Just keep in mind you will have to trim the inner fender pinch weld and possibly the lower valance.

Trustyrusty

Yeah, funny story about the valance...Some of my friends made a giant dick in a parking lot out of snow and I hit it, goodbye lower valance.. And does anyone have a writeup on the pinchweld, I'm an idiot and would like step by step instructions before I get the BFH out and go to town..

abecedarian

not sure I would brag about that...

and a dead-blow hammer against the fender welds near the doors is what you need.

Trustyrusty

Haha you said blow..

Sorry couldn't resist, yeah I'm going with 3.75" then.. cause thats all I can find online.. In steel wheels anyways..

abecedarian

lol.

one thing to think about with wheels, is keeping the steering axis near the center of the contact patch where the tire meets the ground. imagine drawing a line from the top ball joint, through the bottom ball joint and down to the ground. in a perfect world, where that line hits the ground is in the center of the contact patch between the tire and the ground. as the offset changes, the tire is moved. less offset moves the tire even farther out from the truck.
more offset increases the effects of bump steer and also puts more load on the wheel bearings.