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Discussion Starter · #1 ·
For my 2004 Rubicon with 12.5 inch wide tires I made the mistake of getting 1 inch wheel spacers only to discover the front studs were too long. (The lugs made contact with the back of the wheel/rim.) But the same spacers on the rear fit just fine. Huh? I got curious so I measured the front and rear wheelbase widths and the rear was about a half inch wider and the wheel studs stuck out one quarter inch less.

Questions:
  1. How is it that my unmodified factory wheelbase width differs from front to rear? The factory specs say both front and back have a 58.5 inch track.
  2. If I only put 1.25 inch spacers on the front the front wheelbase would be two inches wider than the back and each front wheel would stick out an inch further than the back. Is that okay or just a wild-assed thought?
  3. I have seen Jeeps on the road where the front wheels are NOTICEABLY wider than the back wheels. Is that okay? How does that affect driveability? Safety?
AtDhVaAnNkCsE
Thanks in Advance.
 

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You may want to confirm your measurements.

if you want to run 1” spacers in the front you can change the studs to ones that are shorter by 1/4”.

Or, run 1.25” spacers in the front and 1” in the back.

personally think wider track in front would look goofy like the pre runner Toyota’s you see although I doubt it would cause any issues,
 

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TJ studs come on 2 sizes, rubicon and non rubicon, with the rubicon studs being 1/4" longer. You may want to swap them out.
 
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For my 2004 Rubicon with 12.5 inch wide tires I made the mistake of getting 1 inch wheel spacers only to discover the front studs were too long. (The lugs made contact with the back of the wheel/rim.) But the same spacers on the rear fit just fine. Huh? I got curious so I measured the front and rear wheelbase widths and the rear was about a half inch wider and the wheel studs stuck out one quarter inch less.

Questions:
  1. How is it that my unmodified factory wheelbase width differs from front to rear? The factory specs say both front and back have a 58.5 inch track.
  2. If I only put 1.25 inch spacers on the front the front wheelbase would be two inches wider than the back and each front wheel would stick out an inch further than the back. Is that okay or just a wild-assed thought?
  3. I have seen Jeeps on the road where the front wheels are NOTICEABLY wider than the back wheels. Is that okay? How does that affect driveability? Safety?
AtDhVaAnNkCsE
Thanks in Advance.
Interesting...are you still running the Moab wheels? And factory axle shafts? I run 1"spacers on my factory axles and Moabs and everything bolted up just fine, front and rear.
 

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2004 AiRubicon
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I ran the Spidertrax 1.25" spacers with Stock Moab wheels, Maxxis Creeepy Crawlers 37x12.5.
No rubbing of tires and plenty of room for the stock studs. I always thought the 1.25" spacers were the magic width for TJ Rubicons.
 

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2006 Rubicon Unlimited (LJ)
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Interesting...are you still running the Moab wheels? And factory axle shafts? I run 1"spacers on my factory axles and Moabs and everything bolted up just fine, front and rear.
I know this is old, but factory wheels will still fit because there are voids on the back side for the extra stud length to go into.
 

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Rubi and non rubi have different length studs. Front rubi studs are rubi only and longer, you can replace with stocj TJ studs. Real studs are the same for the Rubi and non Rubi 44, so a bit shorter.
 
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