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Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

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specific Rim and Tire question

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Old Jun 18, 2016 | 01:27 AM
  #1  
Bcreek12's Avatar
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From: middleburg, fl
Default specific Rim and Tire question

Im looking to buy a set of 35x12.50x17 maxis bighorn tires, with ultra motorsort splne 245s rim that are 17x8 with + 10 offset (used with 25k miles the guy is asking 1100$ for all 5)

I currently have a stock rubi unlimited but it is getting the 2.5 lift next week, also another question can I go with a 3 inch lift and not change or worry about anything else. Shop here said max 2.5 unless I wanna beef up rest of suspension .

Can I run those 35s and rims with + 10 off set. on a 2.5 lift, The hole off set thing has me confused.

Thanks in advance
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Old Jun 18, 2016 | 02:56 PM
  #2  
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From: Bunnlevel, NC
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So jeepers look at backspacing rather than offset. For 35s you'll want the backspacing to be 4.5 inches or less. (factory wheels are 6.25 inches). Offset is the distance from the center line of the rim and the wheel mounting surface. Backspacing is the distance from the wheel mounting surface to the lip of the rim that faces to the inside of the jeep.

As for lift, you can run 35s by running that 2.5 inch lift or no lift (flat fender flares).
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Old Jun 18, 2016 | 03:24 PM
  #3  
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From: Austin <--> Colorado Springs
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There are two threads stuck right to the top of this Modified area - FAQ's and Thoughts On Lifts. Both have some good info and are worth a few minutes of your time.

If you plug your offset into an online converter, you will find that an 8 inch rim with +10 offset is around a 4.9" backspace. (So if your stock rims are 6.25 bs, a 4.9 bs puts the tires a bit more than 1.25" further out)

There are differences in both height and width between tires from different mfg's, and vehicle weights, and tire psi's, and axle centering, and lift heights, and ... so none of us can give you a positive answer on fitment. You will probably be ok with 35x12.50's and a 5 backspace, but you won't actually know until you mount them up.

Last edited by nthinuf; Jun 18, 2016 at 03:47 PM.
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Old Jun 21, 2016 | 02:58 AM
  #4  
Bcreek12's Avatar
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From: middleburg, fl
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thanks, I think im gonna look into a new set. don't want used tires on a daily vehicle. Thanks again
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