First i would like to say ive read the part in the newbie thread about backspacing, and it only served to further confuse me. I believe it said the desired amount of backspace is 4.5-4.75" but that 3.75 would make the tires stick way out? Im sure i was misinterpreting the picture in some way. The wheels im looking at are XD Bombs, and it says they've got a 5" backspace. So i would need to add a spacer to DECREASE the amount of backspace? is that correct? If i didnt put a spacer in the stance of my jeep would then be narrower?


The wheels im interested in ( Part W/PXD80629043300 - XD806 BOMB, 20X9 with 5 on 5 and 5 on 135 Bolt Pattern - Gloss Black with Milled Accents )

 

Stock wheels are ~6.25" backspacing (7.5" wheel), below is a picture of 2" backspacing (10" wheel). What was your question?



Edit...

Yes, you would want a spacer to move the wheel out (effectively decreasing the backspacing). My example is real, but extreme. Your wheels won't sit that far out even with spacers.

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yeah, they'd be 9" wide wheels with 5" backspacing

 

Damn n i thought my 2.75 backspacing was getting crazy lol

 

Backspacing is the distance from the back edge of the wheel to the flat part that fits against the brake rotor. The higher the number, the further into the wheel well the tire would sit. With 5' of backspacing, yes you would have a narrower stance, but with that much backspacing, the tire is positioned too far into the wheel well and the sidewall would rub.

If i remember correctly, my wheels have 3.75" backspacing. They do stick out a bit but I like the look of the wider stance.
it is tough to see in this pic but they stick out a tiny bit.

 

I like the look of a wider stance myself, but im going to have that no matter what since im going with XRC armor fenders all around. i imagine though that ill need a small amount of spacer at some point though, especially with 12.5 inch wide tires.

 

12.5" tires with stock wheels will need a spacer. The ones on my jeep in the pic are 12.5" but the wheels themselves only have 3.75" backspacing so I was okay without spacers.

 

Then from what it sounds like ill definitely need them, since my backspacing will be 5"

 

Backspacing is how far your rims are going to stick into your wheel wells measured from the mounting surface. So if you have rims with 5" backspacing and your target backspacing is 4.5" then you only need a half inch spacer to push the rims out. I am running 12.5" wide tires on 9" wide rims with 4.5" of backspacing and nothing rubs yet. I haven't wheeled them yet though but not anticipating any problems.

Oh and my wheels stick out about 2.5" past my bushwacker flatties.

Edit: You can calculate how much your rims will stick out from the mounting surface using this easy formula.

Rim width - backspacing = frontspacing.

Just remember your tires overhang your rim so you need to account for that extra width depending on the width of the tire you buy.

 

Here is what mine look like.