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post #1 of 22 Old 03-20-2017, 08:30 PM Thread Starter
sinawalli
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Wheel spacers

I have a 2.5" lift for my 2013 4 door Rubicon. I will have flat fenders. I want 285-75-17 tires. What is the least amount of wheel spacer I need for stock rims? 1", 1.25"? Or do I need 1.5"? Thanks.

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post #2 of 22 Old 03-20-2017, 10:22 PM
Moezer
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all u can do is get a full spacer that bolts to the wheel hub that would be 1.5 inch
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post #3 of 22 Old 03-21-2017, 03:27 AM
SLADE
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1.25" spacers will work fine.
1.5" spacers are most common.

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post #4 of 22 Old 03-21-2017, 12:04 PM
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best balance of scrub to clearance considerations on OEM wheel widths is:
1.25 for 33 and down.
1.5 for 33.2 and up.

1.5 IS the most common but mainly because that matches the most common tire mod (35s) with AEM wheel BS to the OEM BS so requires no further thought! But smaller diameter tires factor in a lot. A scrub too wide wears bearings, steering ends and ball joint needlessly...

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post #5 of 22 Old 03-30-2017, 02:19 AM
bluefoam
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Q: I'm going to have 33's (285/70r17) with a 2" lift. Will 1.5" spacers be okay? They are easy to get here, other sizes not so much.
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post #6 of 22 Old 03-30-2017, 06:16 AM
GreenbayTJ06
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Quadratec has 1.75" spacers. I have a set and love them. 15k miles with no issues

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post #7 of 22 Old 03-31-2017, 03:05 PM
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Quote:
Originally Posted by bluefoam View Post
Q: I'm going to have 33's (285/70r17) with a 2" lift. Will 1.5" spacers be okay? They are easy to get here, other sizes not so much.
again YES but under 35s 1.25 is the better choice. Just as ^ uses a 1.75 - its not an instant killer to be a bit wide - it just means you stay up on maint more (due to stresses from track being unnecessarily wider).

Quadratec does also have the 1.25.

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post #8 of 22 Old 04-01-2017, 08:35 PM
Bill123
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Try to keep it as close to 1" as possible. The wider you go, the more stress it places on your hubs, especially with larger and heavier wheels and tires.

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post #9 of 22 Old 04-02-2017, 02:35 AM
yoyoyo109
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Is there any difference between using spacers or wheels with better backspacing in reference to hub stress?

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post #10 of 22 Old 04-02-2017, 08:37 AM
Bill123
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Originally Posted by yoyoyo109 View Post
Is there any difference between using spacers or wheels with better backspacing in reference to hub stress?
Yes, there is a difference. It's called offset. I could explain it, but it might be easier for you to look it up yourself.

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post #11 of 22 Old 04-02-2017, 12:00 PM
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If total backspace is same (comparing a 5.75 backspace wheel with 1.25 spacer to a 4.50 backspace wheel, the inside side wall is in same place. Rim width then determines total track (the OEM wheel is an 8 inch so makes half inch narrower track than the most common size 17x9 aem) So a spaced oem at 1.25 is narrower than an aem at 4.50 (unless the aem is 17x8). Where I don't like spacers is unsprung weight - speeds up tires wearing out of balance, shock wear and bearing wear plus the spacers themselves adds several points of maintenance diligence. But do grant a way to get remaining life of tire without stresses of remount (especially if anticipated life is years of low miles), while budgeting out wheels...
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post #12 of 22 Old 04-02-2017, 12:22 PM
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have to say that in the 6 plus years on our JKR and most of its 35k is off road and mostly hard trails on 35s on 15x8 at 3.75 BS. The unit bearings are still stock. The ball joints started getting bad at 15k and lowers by 20 were totally shot.

35k on it now. after a lot of mods to the front axle and steering, am now on 37s on 17x9 at 4.36 BS....see how long the units go from here. i plan to pack extras this summer when we head to Fordyce. i carry a full set of axles as well. just in case.

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post #13 of 22 Old 04-03-2017, 11:59 AM
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Quote:
Originally Posted by 222Doc View Post
have to say that in the 6 plus years on our JKR and most of its 35k is off road and mostly hard trails on 35s on 15x8 at 3.75 BS. The unit bearings are still stock. The ball joints started getting bad at 15k and lowers by 20 were totally shot.

35k on it now. after a lot of mods to the front axle and steering, am now on 37s on 17x9 at 4.36 BS....see how long the units go from here. i plan to pack extras this summer when we head to Fordyce. i carry a full set of axles as well. just in case.
Great recap info. Seemed like low numbers until I remind myself your ratio is probably less than 5% at highway speed. And work it pretty hard on rocks... remember just like wind force - the faster you go the higher the frequency effect on all the moving stuff. With wind its double the speed quadruple the effect. rotating freqs is approximately double to triple (and very material dependant).

J Wm Bishop EA, ASADE
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post #14 of 22 Old 04-03-2017, 06:28 PM
fooddude
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5 years.
72k miles
No issues with spacers.
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post #15 of 22 Old 04-06-2017, 10:23 AM
lloydsmale
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no real world difference. I would even think a steal wheel with the proper offset would be worse then an aluminum rim with spacers. More unsprung weight.
Quote:
Originally Posted by yoyoyo109 View Post
Is there any difference between using spacers or wheels with better backspacing in reference to hub stress?

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