Wheel backspacing for 37’s

quietpeen

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Not sure what that shop is talking about. I prefer a good spring lift, but 1.5” is perfect for 35’s on a 2 door, and no one makes a spring lift that short. Might not get it off road again till the end of next month. Busy working on the wife’s Gladiator.
I’m betting they are up selling some. I’m not against spending a little more for a better lift, and the 1.5 teraflex with shock is over $900 so it’s not cheap by any means. At that point though I’m tempted to spend a little more to get a lift and 37’s





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MarkY3130

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I’m betting they are up selling some. I’m not against spending a little more for a better lift, and the 1.5 teraflex with shock is over $900 so it’s not cheap by any means. At that point though I’m tempted to spend a little more to get a lift and 37’s
I have 1” spacers (technically two 1/2” spacers stacked) at each corner. I have 315/70/17 KO2’s and I am using the stock rubi shocks. While I am sure I would benefit from a longer shock, I wheel mine nearly every weekend on red (difficulty rating) trails in Colorado and it does really well. With this setup I have had zero rub issues from the tires.

That said, I plan to install a 2.5” lift and 37” tires next year. Has nothing to do with the spacer lift, I would just appreciate the extra clearance on some of the trails that I am currently bumping, dragging, and scraping the Jeep down in some spots.
 

guarnibl

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AEV wheels have 5.72 backspacing and they claim that they work with a 37x12.50r17. Based on that your wheels and 37s should work.

Personally, I'm still stuck in the JK mindset when it comes to wheels and think less backspacing is the way to go.

I ran 40s with 2.825 backspacing. I will be running 38s with 4.5 sometime next week. I'm hoping 4.5 works out.
I am running AEV's with 37x12.50 (Nitto MT's). No issues with rubbing. I do have adj track bars though. I think 4.5 would be fine as well. I would probably want that for a 13.50 tire. This rig will never see 40's (or if it does, it would be for a single trip a year and rubbing for a day isn't a huge issue), so I am not worried.
 

ChattVol

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Well I can’t answer you for sure right now but in a week or so I’ll have a similar setup to what you’re saying. 17x9 +12 5.5 bs wheels with 37 12.5 mastercraft tires. I’ve seen quite a few on here with stock wheels running that size without issues. The wheels I’m getting have 13mm more inner clearance and push the wheel out 51mm (2 inches) more than oem wheels, so anticipating I’ll be good.

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Did you get a chance to flex it on 37s? I have a 2.5" lift on 17×8.5 (5.2 backspacing) wheels with 35s and am close to rubbing with 2 bumpstops in front at full compression. I imagine you'll rub decently when flexing offroad with 5.7 backspacing and 37s. Most folks recommend 4.5 backspacing or less.
 

sourdough

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Backspacing and tire rubbing posts are so confusing when I don't know if a guy has a Rubicon with wider axles and higher fenders or a non Rubicon. I got the same problem when reading about lifts and how much height. Is it a Rubicon or other, loaded with accessories/ stock. Makes all the difference. Just saying out loud.
BTW, I spoke to AEV about their JL Pintler wheels and 37's. With their 2.5" lift on a JL Rubicon they clear but for very seldom rubbing in rear fender were the plastic liner bumps out for the evap. canister. I have installed a Mopar lift(over 2.75" on my JL Rubicon) and have AEV JL Pintler wheels and waiting for 37" Pat's on backorder. I'll report back early Oct. when I've gotten tire's. Cheers

11/17 update: Pat's never came in @ Discount tire and I switched to 37" Coopers STT. J ust returned from Rubicon Trail and no rubbing and great traction. Very pleased with lift wheels and tires.
 
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Jerrybizzle

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Did you get a chance to flex it on 37s? I have a 2.5" lift on 17×8.5 (5.2 backspacing) wheels with 35s and am close to rubbing with 2 bumpstops in front at full compression. I imagine you'll rub decently when flexing offroad with 5.7 backspacing and 37s. Most folks recommend 4.5 backspacing or less.
Have not had a chance to flex it out yet. Just barely got everything installed. I did position the rear bump stop extension in the 3 inch position as everyone said in the 2 inch position they rub, including possibly the fender. Here’s some pics. Probably won’t be able to get out until next week for a flex test.

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ChattVol

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Have not had a chance to flex it out yet. Just barely got everything installed. I did position the rear bump stop extension in the 3 inch position as everyone said in the 2 inch position they rub, including possibly the fender. Here’s some pics. Probably won’t be able to get out until next week for a flex test.

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Looks good...how do the tires ride?
 

Jerrybizzle

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Looks good...how do the tires ride?
Thanks. So far they are good. Have them at 30psi cold. May need to drop them a little more as it looks like it’s still riding on the centers a bit much. Only about 100 miles on the new setup so far.
 

OnlyOne

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I’m running 315/70’s on a 5.2” backspaced wheel. Thinking of going 37’s, will my wheels work, or do I need new wheels? If so, what are you guys running with 37’s, 4.5” of backspacing? I’m still more in tune with the JK for wheel/tires setups.
I run 37s on factory wheels and no spacers. I turned the steering stops out a few turns and have no rubbing anywhere. Those AEVs will be just fine. If you like them keep them. Will never notice the turning difference, especially with AEVs.

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Jerrybizzle

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Jerry, I see you have a Rubicon but what lift do you have and what wheel back spacing? do you know how much your Rubi weighs ?
Rough country spacer lift for now. Will see how it performs for a while and go from there. MAY get a different lift over the winter but this one seems to ride just fine and will be heading to Moab in a month to see how the setup does off-road. Wheels are 17x9 +12, so 5.5 inch backspacing.
Weight I don’t know. Tires and wheels are 95 pounds per corner. Bumper was around 50, sliders around 70 so not super heavy.
 

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