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Old 09-16-2013, 08:41 PM   #31
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Originally Posted by davison0976 View Post
If anything, when you put spacers on stock wheels you reduce torsional stress on the axles.

Let's think about it. Your stock wheel has 6.5 backspace and is 8.5 wide, so you are 2.25 off center. With a 1.5 spacer you are only 0.75 off center.
Don't bring simple math and physics into this thread, spacers are evil and everyone knows it.

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Old 09-16-2013, 08:49 PM   #32
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One very good reason to use spacers with stock wheels is to run tire chains on the OEM 32's (Sahara, Sport S, Rubicon).

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Old 09-16-2013, 09:29 PM   #33
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i will add my 2 cents worth lol i have the rc spacers and they were great, i happen to like the look of the stock wheel and the stance the spacers give me. But after a year and a half of problem free driving on and off road i read this thread , and i decided that i didnt pay enough for them , took them off and threw them in the garbage, set the garbage on fire and bought the spidertrax ones cuz they cost 3 times as much and ..... this is a BIG AND ... They are blue , and everyoneone who is anyone knows that if something is anodized and comes with a cool sticker that it has to be Better , i mean come on guys it's smurfing blue, how can it not be better ?? if anyone can answer this please feel free. I would aslo like to mention that after installing the new "Blue" wheel spacers, the lady's are all over me ,i mean i am now the sexiest man around , i went from "who's that guy? " to " Here comes BIG POPPIE"
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Old 09-16-2013, 09:30 PM   #34
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Quote:
Originally Posted by davison0976 View Post
If anything, when you put spacers on stock wheels you reduce torsional stress on the axles.

Let's think about it. Your stock wheel has 6.5 backspace and is 8.5 wide, so you are 2.25 off center. With a 1.5 spacer you are only 0.75 off center.
Actually, the backspacing has no relationship to torsional stress on the axle. The torsional stress is limited by the torque from the engine (or the frictional resistance between the tire and the ground). I believe that the stress you are referring to is the bending stress. If the wheel is centered on the lugs, the stress on the lugs would be a shear stress. If the wheel is off center, there will be a bending stress (in addition to the shear stress) reacted by the lugs and transfered to the axle.

Basically, the further out you push the center of the wheels, the greater the bending stress.

That said, as long as spacers are torqued properly, the change in stress in the axle should be no different than the stress resulting from an aftermarket wheel that places the center of the tire at the same distance from the axle.
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Old 09-17-2013, 07:17 AM   #35
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Originally Posted by BubbaEinstein View Post
Don't bring simple math and physics into this thread, spacers are evil and everyone knows it.
Yeah man, and tv, radio and internet, among other things, are from devil.
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Old 09-17-2013, 08:02 AM   #36
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Actually, the backspacing has no relationship to torsional stress on the axle. The torsional stress is limited by the torque from the engine (or the frictional resistance between the tire and the ground). I believe that the stress you are referring to is the bending stress. If the wheel is centered on the lugs, the stress on the lugs would be a shear stress. If the wheel is off center, there will be a bending stress (in addition to the shear stress) reacted by the lugs and transfered to the axle.

Basically, the further out you push the center of the wheels, the greater the bending stress.

That said, as long as spacers are torqued properly, the change in stress in the axle should be no different than the stress resulting from an aftermarket wheel that places the center of the tire at the same distance from the axle.
You are correct, I meant to say bending stress, not torsional stress. But the stress I was thinking at the moment was not the stress on axle due to the center of wheel being further away, which I of course agree with, but the stress experienced by the system due to the wheel mounting pad being further off center.

Any ideas about that? Is it even sufficiently significant stress to consider?
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Old 09-17-2013, 10:24 AM   #37
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Originally Posted by davison0976 View Post

You are correct, I meant to say bending stress, not torsional stress. But the stress I was thinking at the moment was not the stress on axle due to the center of wheel being further away, which I of course agree with, but the stress experienced by the system due to the wheel mounting pad being further off center.

Any ideas about that? Is it even sufficiently significant stress to consider?
I think what you are talking about affects the wheel design rather than what your jeep sees. Basically, I don't see any reason for spacers to affect the jeep differently than an aftermarket wheel that results in the same wheel placement. The key is to make sure everything is torqued properly.
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Old 12-20-2013, 01:32 PM   #38
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I'll bet a well made spacer is stronger than the hub of most spoke wheels.
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Old 12-20-2013, 08:00 PM   #39
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When I bought my Terflex lift I bought the 1.5" spacers from Terflex. No issues. Just give them a quick check with my tire rotations. I'm inclined to agree with the others. It doesn't matter if you use spacers or an aftermarket rim with equal back spacing. The stress on the axle/wheel hub would be the same.
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Old 12-21-2013, 07:43 PM   #40
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OK. I got all excited and screwed the pooch on a Craigslist purchase. But I'm new, so don't shoot. I bought MB TKO Wheels for my '13 JKU. I didn't consider backspacing when I looked at the deal, thinking they would fit. They have a 5.5inch BS. I am installing a Teraflex 2.5 lift w/shocks and will run Duratrac 315's. Can anyone say whether the 5.5 BS will work? Would Spidertax spacers make everything OK? And I notice the Spidertrax are sold in pairs. Doesn't everyone need 4?

Thank you for any great answers you can provide.
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Old 12-21-2013, 10:48 PM   #41
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Originally Posted by rcsmith005 View Post
OK. I got all excited and screwed the pooch on a Craigslist purchase. But I'm new, so don't shoot. I bought MB TKO Wheels for my '13 JKU. I didn't consider backspacing when I looked at the deal, thinking they would fit. They have a 5.5inch BS. I am installing a Teraflex 2.5 lift w/shocks and will run Duratrac 315's. Can anyone say whether the 5.5 BS will work? Would Spidertax spacers make everything OK? And I notice the Spidertrax are sold in pairs. Doesn't everyone need 4? Thank you for any great answers you can provide.
From what I understand, if you plan on stepping up tire size (305, 315 etc) and not running spacers, you're limited to a max bs of 4.5". You can get away with 4.75" but might have some rubbing esp the front air dam...so I would think that the TKO's won't work without spacers. Spidertrax would be the way to go. I have a set of their 1.5" and am very pleased with them, and yes, they're sold in pairs so you will need 2.
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Old 12-21-2013, 11:14 PM   #42
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I think they are sold in pairs so guys like me who are jest trying to get rid of rubbing issues on the rear tires
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Old 12-22-2013, 02:46 PM   #43
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Thanks for the responses. I think I'm going to go with the Spidertax spacers to mitigate my bonehead purchase. It will be a good reason to change the look with new correctly backspaced wheels in a couple years when new rubber is needed.
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Old 12-22-2013, 03:12 PM   #44
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this.
woops, tried to multiquote... but yes, and I also like the look of them.
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Old 08-16-2014, 06:43 AM   #45
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Thanks for thevhelp
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Old 08-16-2014, 07:43 AM   #46
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Mass bans them. Local PD says they issue citations for using them.
Not sure how the LEOs can tell if you have spacers. I think what's not legal is having your tires stick out past the fenders.

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