How much Negative Offset - JeepForum.com
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post #1 of 10 Old 07-07-2020, 10:39 PM Thread Starter
BouJee'
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How much Negative Offset

I've searched the forum and can't find the answer to what I feel is a simple question...

I want a little wider Track Width. As far as Knuckles and Bearings are concerned, how much Negative Offset is okay to run on 12.5" wide tires?

Please don't worry about my lift or tires or back spacing or fenders or my state laws, etc. Just want to know as far as Knuckles and Bearings are concerned...how much Negative Offset on 12.5" wide tires is Okay? Thank You.

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post #2 of 10 Old 07-07-2020, 10:45 PM
TheBoogieman
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Forget offset and think backspacing. 3.75-4.5."
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Quote:
Originally Posted by jeepinmichguy_ View Post
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GOT IT BACK 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #3 of 10 Old 07-08-2020, 12:48 AM Thread Starter
BouJee'
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Quote:
Originally Posted by TheBoogieman View Post
Forget offset and think backspacing. 3.75-4.5."
This is 4.25" back spacing. So what do I need? Wider wheels/tires? Wider axle assembly? Your Track Width is where I'd like to be.

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post #4 of 10 Old 07-08-2020, 04:04 AM
TheBoogieman
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Mine are 4" backspacing, but I have 10" wide wheels.
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Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
GOT IT BACK 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #5 of 10 Old 07-08-2020, 07:50 AM
grogie
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You can find less backspacing. I use to have 15x8" wheels with 3.25" backspacing. Shown here, these are 11.5" wide tires.

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post #6 of 10 Old 07-09-2020, 08:31 AM
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The farther out you go from the factory location, the more stress you put on the hub bearings
Many times I hear people say that the hub bearings on TJ's are a 'weak point', you never hear the same people say how much offset or how large their tires are.

I seem to change my bearings every year, 35-13.5/15 on 10" wheels and 3.75 offset and running them over boulders all the time I expect it.

Run what ya want but expect what will happen
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post #7 of 10 Old 07-10-2020, 08:54 AM
2jhanna
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As mouse stated above, the further out you go, the more stress. Unless you go with wider axles, which is a whole other topic.

Why not just try a set of wheel spacers. Cheapest, easiest way to go, and see where that gets you.

I am multi-talented, I can talk and piss you off at the same time.

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post #8 of 10 Old 07-10-2020, 11:17 AM
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Quote:
Originally Posted by Mousejockey View Post
The farther out you go from the factory location, the more stress you put on the hub bearings
Many times I hear people say that the hub bearings on TJ's are a 'weak point', you never hear the same people say how much offset or how large their tires are.

I seem to change my bearings every year, 35-13.5/15 on 10" wheels and 3.75 offset and running them over boulders all the time I expect it.
Bearings are pretty cheap. I buy Detroit axle and get free ones if they fail within 10 years. Don't ask, don't tell, goes for warranty info too.

Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
GOT IT BACK 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #9 of 10 Old 07-10-2020, 01:12 PM Thread Starter
BouJee'
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Quote:
Originally Posted by 2jhanna View Post
As mouse stated above, the further out you go, the more stress. Unless you go with wider axles, which is a whole other topic.

Why not just try a set of wheel spacers. Cheapest, easiest way to go, and see where that gets you.
Well that's the plan. Apparently I can only space 1/2" to be at the coveted 3.75" which doesn't seem like a big enough difference. May just jump up to an inch and deal with bearings.

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post #10 of 10 Old 07-10-2020, 01:54 PM
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Quote:
Originally Posted by BouJee' View Post
Well that's the plan. Apparently I can only space 1/2" to be at the coveted 3.75" which doesn't seem like a big enough difference. May just jump up to an inch and deal with bearings.

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1/2" spacers are the type that do not bolt on. I wouldn't use those.

1.25" spacers will put you at the equivalent of 3" backspacing. That would be fine. You'll end up looking very similar to grogie's red TJ posted above except 1/4" wider on each side.

Or dump your 8" wide wheels and get 10" wide. 8" wide wheels with 4" backspacing vs 10" wide wheels with 4" backspacing, the 10" wheels stick out 2" further.
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