37 x 12.50 or 35 x 14.50??!!! - Jeep Wrangler Forum

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Old 06-11-2013, 10:11 PM   #1
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37 x 12.50 or 35 x 14.50??!!!

I have a 2 door JK rubi - just re-geared to 5.38's. running a terra long arm w/ 35x12.50's. I know if I go up to 37's I will need new shafts, 35's (have not gotten it twisted up yet), stock works fine. Next mod is to upgrade these, but cash does not grow on trees!

Question - will I need to get wheel spacers to run a 35x14.50 bogger? Should I just pull the trigger on the shafts and do the 37x12.50's instead? I have the bush wacker flares, so not worried about rubbing there, but do have the warn front and rear bumpers (not the stubby). Any input would be appreciated!
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Old 06-11-2013, 10:25 PM   #2
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I believe if you already have somewhere around 3.75" backspacing you're good to run those tires, but man are those fat. Those will float over mud. You may not need shafts for 37's. if you don't need them now and aren't adding more lift they should hold out

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Old 06-11-2013, 10:31 PM   #3
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I would think you would definitely need wheel spacers for a 14.5. You may not like the way it looks when mounted to your jeep though, I would find some pics. I would get 37s and replace your shafts when they/if they go. im on a rk 2.5 lift and 37s and still have my stock dss

For what its worth, I have 37x13.5 on my 2.5 lift with wheels 4.5 backspacing. if I didn't have a lot of washers on my steering stops, I would totally rub the frame on full turn. my turning radius isn't that great.
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Old 06-11-2013, 10:34 PM   #4
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Driving "axle minded" can save your axle shafts for the time being. I've got rcvs up front but still stock shafts rear on 37s and I push my rig on pretty difficult stuff. Why a 14.50 bogger as opposed to a 37? Two different directions in my opinion. you're either going two inches out, or two inches up. One for clearance, the other for ?? Mud? Both will add weight and additional stress on your shafts. I used 1 1/4 spacers to push my tires out enough for full turning radius without rubbing.
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Old 06-11-2013, 10:37 PM   #5
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Shafts for 37"s? What year is the jeep? I run 37"s and have some possibly unique knowledge of axle shafts on a rubicon jk.
08' JKUR auto | traildash | SuperWinchEPi9 | ASFIR bumpers and skids | Xenon Flat Flares | TF 6" lift with monster Panhard bars | 37" GY MTRcK | MT classic II wheels 4.5" bs | Coast drive shafts | RCV front axleshafts | lots of extras
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