Backspace/Offset to replace 1.25" wheel spacers

[Trik444]

I'm running 1.25" Spidertrax wheel spacers with my stock Sport wheels which gives it a nice stance. Tires are 285/70/17 Cooper STT's.

I'm thinking about buying new rims with a deep lip and I want the same stance I have now but I want to lose the spacers. It seems like a 4.5" backspacing and 0 offset is the setup of choice from reading a lot of threads, but I don't really understand how offset directly related to how much lip you get......does 5" of backspacing equate to more of a deep-dish look than 4.5"? What does the offset have to do with it? I gues I'm asking, how deep of a lip can I get before it becomes a problem with clearing brake calipers? I also don't want my tires sticking any farther outside of the wheel well than they are already with the spacers installed. Thanks in advance!

pics for reference
http://www.toyota-4runner.org/showthread.php?threadid=23302

 

[T?@\7]

good thread. ive often wondered the same

 

[rook]

Stock wheels are 7.5" wide with 30mm positive offset. Backspacing is the depth of the hub mounting surface from the inside of the wheel. Stock backspacing is calculated this way:

3.75"(wheel center) +1.18" (offset)= 4.93". Lets call it 5".

For measurement purposes, if you then laid the spacer on the inside hub mounting surface, the backspace is 3.75" (5"-1.25")


To get this stance without spacers, get an 8" wide wheel with a slightly negative offset. A zero offset wheel would have 4" backspacing. Negative offset equates to deep dish, moving the hub mounting surface deeper into the wheel, creating the width you want.

Caliper clearance is more dependent on the wheel diameter, so go with 17" wheels for your SE. 18" wheels will make tire shopping more expensive.

 

[Fuzion]

Im running 4.75 backspacing with a +6 mm offset and they stick out just right.

 

[Trik444]

You guys are awesome. Thanks for the easy explanation!

 

[Even Steven]

Im running 4.75 backspacing with a +6 mm offset and they stick out just right.

Yeah, but you have a 3rd generation 4Runner...and even the stock wheels were more much more flush without even using wheel spacers.

I think when Toyota decided to build the wider body on the 4th gen, they kept the same track as the 3rd generation, making the tires seem tucked in quite a bit.... and the '06 and newer 4Runners suffer even more because the fender flares are larger than the '03-'05 models.

 

[Pincushion]

This should make it easier to understand.

https://www.rsracing.com/tech-wheel.html

 

[Fuzion]

Yeah, but you have a 3rd generation 4Runner...and even the stock wheels were more much more flush without even using wheel spacers.

I think when Toyota decided to build the wider body on the 4th gen, they kept the same track as the 3rd generation, making the tires seem tucked in quite a bit.... and the '06 and newer 4Runners suffer even more because the fender flares are larger than the '03-'05 models.

The avatar is my old 3rd gen. 4th gen now.

 

[kman79]

I apologize for bringing up an old thread and my ignorance on the matter.

I'm looking at an 18x9 wheel with an offset of -12, which equals out to about 4.25" of backspacing. What I want to do is push the wheel out more to where it is flush with the fender and give it a slightly wider stance

In terms of backspacing, if I want to push the wheel out more should I be looking for wheels with more of a negative offset or smaller number backspacing, correct?

With that said, if the stock backspacing is about 5", the wheels I'm talking about has a backspacing of 4.25", which if my thinking is correct, should make the stance wider by 0.75", is that correct?

Thanks for the help

 

[chaz]

kman79, these charts may help. offset chart Wheel Offset Calculator

 

[kman79]

Thanks for the links, they were very helpful