best BS for 37" tires
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
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From: Laguna Niguel, CA
4-7/8" is way too much and you will get rubbing at a full turn and your rear side walls will sit really really close to the rear sway bar. 4-1/2" is the most i would go with and really, around 4" would be safer.
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JK Junkie
Joined: Oct 2007
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From: Montana
Im thinking about Walker Evans wheels. Should I just go with the 3 3/4" back spacing? I plan on a 4.5" lift and 37s. I want to run stock flares. With that small of a BS will the tires hit the fender flares easier and not tuck when flexing.
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
I want to run stock flares. With that small of a BS will the tires hit the fender flares easier and not tuck when flexing.
JK-Forum Founder
Joined: Jul 2006
Posts: 36,534
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From: Laguna Niguel, CA
i can tell you that i've tried running toyo's on 4.75" wheels and had all kinds of rubbing issues at a full turn and especially at a full turn and flexed. toyo's are a very wide 13.50 and you will have rubbing issues.
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JK Junkie
Joined: Oct 2007
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From: Montana
anything less than stock will put more strain on your unit bearings and any tire taller than stock will put more stress on your axle c's and ball joints. i'm not trying to be smart here but if you're really worried about things like this, i would recommend that you stick with stock tires mounted on stock wheels.
37s or 40s are in my near future.
Im looking at 3 different wheels.
-17x9 with 4.75 BS
-17x8 with 4.75 BS
-17x8 with 4 7/8" BS
Last edited by kntr; Jan 26, 2011 at 07:33 AM.
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JK Junkie
Joined: Oct 2007
Posts: 2,361
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From: Montana
X2 Don't go more than 4.5" with 37s. 4" works the best with 37s because you don't have to adjust your steering stops as much.
A person can run 37s with more than 4.5" backspacing, but they will have to run taller suspension extended bumpstops to avoid rubbing on full flex, and they will have to adjust their steering stops significantly more (increasing turning radius) to avoid rubbing on lower control arms, the swaybar, and the frame with a full-lock turn.
You can order WE beadlocks with 4.5" or less backspacing.
A person can run 37s with more than 4.5" backspacing, but they will have to run taller suspension extended bumpstops to avoid rubbing on full flex, and they will have to adjust their steering stops significantly more (increasing turning radius) to avoid rubbing on lower control arms, the swaybar, and the frame with a full-lock turn.
You can order WE beadlocks with 4.5" or less backspacing.
JK Enthusiast
Joined: Jun 2010
Posts: 355
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From: North VA
Yup, I have 37" KM2s with 4.5 BS and they rub the sway bar just a tit at full lock. I would not be comfortable with 4.75 or more. 4.5 is the min.