Wheel Backspacing and Offset Info

Thanks, man. I appreciate the input and info. Seriously. I think I'm just gonna go for it and see what happens.

 

After reading the OG post in this thread and sifting through several pages, I believe I've come to the conclusion that a 00mm offset wheel with 4.5" of backspacing SHOULD clear the calipers of my 98 Taco 4x4.
Can I get a co-sign on this

 

I have a 2019 Off Road with stock suspension.

What are the benefits and drawbacks if any of going to 17 inch?

I am still confused after reading this thread and wonder if there is a knowledgeable wheel store I can call to help me decide what to get such as offsets, etc.

 

Are you trying to decide between a 16” wheel vs a 17” wheel? I don’t think there necessarily is a pro or con. It really depends on the tire options. I believe there are more options with a 17” wheel.

 

Hey guys, a little help would be awesome!!?!

According to the ton of research I've done I should have no problem fitting this wheel and tire combo?

-15x8 3.75 BS -19 offset
-32x11.5 r15 Tires
-2.5" 5100 lift
-1998 TRD Tacoma

 

I currently have 265/70s on stock 17" rims which are 7.5" wide with +30mm offset with no rubbing issues on my 2nd gen

will those same tires fit on 17" rims that are 8" wide with 0 offset without rubbing?

 

Maybe...maybe not.
The tire is going to poke 1-3/16" further...about the same as adding 1-1/4" wheel spacers to your current setup.
Try placing a 1-3/16" object on the outside of tire, mimicking the poke and see if it clears.

Those tires will fit on a 8" wide rim.

 

Thanks Man. That is good info. I will try taping something to the outside of the tire and see what happens. I really appreciate your help!

 

So if I want it completely flat from my fender flares to my tires on my 2016 Tacoma Trd Sport. what kind of backspacing should I look for?

 

What offset/backspacing should I look for if I want my tires to be flat with my fender flares on my 16' trd sport?

 

did that work on you’re truck without lift?

 

I posted this in another thread but didn't get a response so I'll try here.
OK, I'm thinking I have this right but want to make sure:
If I'm going from this first gen TRD wheel on my Taco


5 spoke 'Star' TRD alloys 16x7 4.5" backspacing, 15mm offset
Part Number:
69395
TWTP15UN5992Z
426110C020
4261135170

To 2nd Gen TRD alloy


TRD Off-Road Wheels: 16x7, +32 mm offset, 5.25" backspacing, 6x5.5" bolt pattern
Part Number:
69461
42611AD030
42611AD031

To have the wheel/tire be in the same exact position (with the 2nd gen wheel on the "04 Taco) I would need a .75" spacer. correct? Since that .75" might give me issues with the length of the stock studs I could actually go up to a 1.25" spacer and would only move my wheels out .5" right?

15mm offset vs 32mm offset/ 4.5" backspacing vs 5.25" backspacing.

 

Now I've confused myself again. If being +17mm offset (+32mm for the 2nd gen vs +15mm for the first gen) moves the wheel out, and 19.05mm is the difference between the 2nd gen 5.25" (139.7mm) vs the 4.5" (114.3mm) is only @ 2mm net (19 - 17MM). Or does it move the wheel out farther: +17mm plus +19mm for a total of +34mm (1.34 inches)?
Either way it doesn't look like I would need spacers.
Anybody want to set me straight?

Thanks

 

Hey Sloanmonster I am just trying to figure out all this backspacing/offset stuff myself so would feel better if someone else commented but here is what I came up with based off the information provided:

The first wheel with 4.5" BS and 15mm OS (I am assuming a negative offset) puts you at 5.1" total spacing. If the offset is positive it puts you at 3.9 total spacing.

The new wheel with 5.25" BS and +32mm offset puts you at 3.95" total spacing.

So depending if the offset is - or + on the first wheel you will either have a 1.15" difference and need spacers or a .05 difference and shouldn't need anything.

Hope that makes sense and more so hope it is right!

 

Re-reading your second message it looks like it is +15 offset so I agree with you that you should not need any spacers as you are super close to the original, only .05" off.

 

Hi all,
I’m in love with the bronze Black Rhino Roku wheels in 17...
But they only do 17x9.5 with either +12 or -18 offset.
I’m expecting to keep my stock tires for now and no lift.
Anyone knows if the +12 will rub inside or if they will also stick out to much from the fenders?
Thanks for any pointers!

 

ok here is an issue I am having.
the wheels I have-


the problem I have- rubbingon tire off of new lower control arm dual shock mount with 1.5 spacer


would this wheel move the rim edge out so no contact would be made at full lock?


any thoughts would be appreciated

 

I haven’t been able to find a thread or discussion on this set up...
Anyone running a wheel with a 5.5 back spacing and larger tires? Say around a 285/70/17 or in my case a 265/70/18?
32.5”x11-12”width....
The back spacing is my primary question, not if and what it takes to fit the tires.
Thank you.

 

As I see it, backspacing exists to accomodate other decisions, providing minor adjustments tradeoffs for a clean sheet design, as OEM experiences it. If you start with an engine/body design, things get squeezed into that starting with front suspension components, which usually becomes the primary determinant of track width. After that, rear axle width can be chosen and an offset is selected so wheels can accomodate being in front or rear position while not upsetting style - kind of important, with only one spare [and maybe front discs/rear drums]. Go positive on backspacing, and your wheel bearings take a little more of the brunt of road conditions/track gets narrowed; go negative and you start stressing studs more/track widens. If I had to pick one for reliability, a small positive offset [10 - 15mm ] is nice. If I wanted stability in mud, I'm going negative and widening the track. Upshot? Your offset may be 50% function, 50% style - only the design team knows what compromises were made. Go way far outside of that and engineers will say 'you can't warranty this' or sales team says 'you can't sell this'. Either one is a show stopper.

 

Sorry if this has already been answered,
I have a 2020 sr 4x4 double cab. I’m going to run the eibach pro kit at 2 inches with deaver add a leaf. I’m looking at Fuel wheels 17x8.5 -6mm offset and Falken wildpeaks 275/70/17. I’m just trying to figure out if I’m going to run into any rubbing issues? I’d like to avoid any trimming or cutting.