I have an 08 jk 4d unlimited. I put a 2.5 terflex lift on which says it will clear 35 tires. I have 18x9 mammoth ultra wheels and am wondering if I will have enough backspace for these Nitto trail grappers at 35/12.50/18?

 

What's the backspacing on the rims?

TeraFlex gives a recommendation right in the info on that lift, so that's probably a good place to start.

 

it says on the rims that the "backside setting" is 5 and the offset is 0

 

The backside setting is your backspace, so yours is 5". The offset is the distance measure off the centerline of the wheel. Since you are running a 9" wheel, that is typically measured from from the inside flange of the wheel, so the overall width is usually .5" wider on each side, or 1" making this a 10" width wheel from outer flange to outer flange. This is why a 0 offset shows 5" backspace on a 9" wheel.

 

So am I gonna need spacers with a 5 backsetting?

 

Lots of variables involved. Best advice is just the slap them on and see what happens.

Just because someone else does or does not rub with a 5 BS is no indication of whether or not you will with your specific setup. If you rub, do some trimming, yank the skid, go to a stubby, bring in the steer stops, add more height or more bumpstop, trim the flares, etc.


TF recommends a 4.5" because they have apparently done some testing and know it works.

 

Ran 5.0 bs with my old tire wheel setup, I rubbed the sway bar slightly at full lock..not a big deal. ^^ and what he said.

sent from HTC Thunderbolt via tapatalk.

 

"Roger, roger. What's your vector, Victor?"

You can spend a bunch of time figuring out little tweaks to prevent rubbing, or you can spend some $$$ on spacers and not have to think about it anymore. Plus, I think the wider stance looks great on a JK

 

You right I like the wider stance anyway...its gonna be pretty impressive when I finally get it all together.

 

I put on 1.5" spidertrax spacers and my 35x12.50 Goodyear Wrangler MT/R's fit great with no rub on my lift. I am using the stock rims.