Backspacing questions...
Ok JK forum, I request your collective knowledge again
Finally got tires ordered for the GF for her 08' 4 door, now im torn,
I plan on buying Black Rock type D's to mount said 265/75/16 BFG All terrains on and was going to go 16x8 but now I dont know which backspace to go, 4.25 or 5.00
Please help and thanks
Finally got tires ordered for the GF for her 08' 4 door, now im torn,
I plan on buying Black Rock type D's to mount said 265/75/16 BFG All terrains on and was going to go 16x8 but now I dont know which backspace to go, 4.25 or 5.00
Please help and thanks
Originally Posted by Dale Gribble
Ok JK forum, I request your collective knowledge again
Finally got tires ordered for the GF for her 08' 4 door, now im torn,
I plan on buying Black Rock type D's to mount said 265/75/16 BFG All terrains on and was going to go 16x8 but now I dont know which backspace to go, 4.25 or 5.00
Please help and thanks
Finally got tires ordered for the GF for her 08' 4 door, now im torn,
I plan on buying Black Rock type D's to mount said 265/75/16 BFG All terrains on and was going to go 16x8 but now I dont know which backspace to go, 4.25 or 5.00
Please help and thanks

If you don't have fender/tire coverage laws, the 4.25 BS would be the better choice. With that size tire, the 5 bs will work fine, but the 4.25 will allow you to go to a bigger tire in the future without having to buy another set of rims or add spacers.
as mentioned, 4.25 would be the better back spacing to go with but, they will cause your tires to stick out past your flares a bit. something to consider if you need to keep your tires inside your fenders.
Both backspacing will be fine. It just depends how much your JK wants to grow in the future and on how much you care about tire sticking out past the fenders. Personally I would go with the 5.00" because of the laws we have in QC. Furthermore having the tires inside the fenders help to keep the JK clean.
5.00" backspacing on an 8" wheel is 12mm offset.
This offset is similar to AEV pintler wheels that many uses with 35x12.5 tires and 2.5" lift. Actually pintlers are 5.15" backspacing but they publish 4.7" to fit common thinking that you need something between 3.75" to 4.75" backspacing.
That said the 5" backspacing whells would still support a small lift are quite large tires.
5.00" backspacing on an 8" wheel is 12mm offset.
This offset is similar to AEV pintler wheels that many uses with 35x12.5 tires and 2.5" lift. Actually pintlers are 5.15" backspacing but they publish 4.7" to fit common thinking that you need something between 3.75" to 4.75" backspacing.
That said the 5" backspacing whells would still support a small lift are quite large tires.
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http://www.4wd.com/productdetails.aspx?partId=55131
So, I agree with going 4.25 since I went a similar direction. However, I have a buddy with a 4" lift on his Unlimited running Rugged Ridge wheels (5" BS) and 35x12.50 tires and he's not having problems.
Last edited by tslewisz; Dec 29, 2010 at 05:35 AM.
Originally Posted by tslewisz
Actually, 16x8 7069's for a JK are listed as having 4.00" of backspace. Probably nitpicking, but since I have that wheel, too, it caught my eye.
http://www.4wd.com/productdetails.aspx?partId=55131
So, I agree with going 4.25 since I went a similar direction. However, I have a buddy with a 4" lift on his Unlimited running Rugged Ridge wheels (5" BS) and 35x12.50 tires and he's not having problems.
Last edited by Orangeav; Dec 29, 2010 at 05:56 AM.





