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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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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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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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Old 12-02-2014, 12:15 PM   #47
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Mass bans them. Local PD says they issue citations for using them.



This is my XJ with its 33x12.5 tires on 10 inch steel rims for Mall Crawling. I have 35x12.5 on 10's for off road use. I wanted a stronger axle and wanted rear disc brakes; so i killed two birds with one stone and bought a Ford Exploder 8.8 rear axle with disk brakes. problem is the Exploder axle is a bit shorter than the stock front dana axle. So i added two 1 inch spacers in the rear and 1/2 inch spacers up front. I switched from alloy to steel rims for the lower price to replace, lower weight over alloys and i need 10 inch rims to accomidate the the 12.50 Bead on my tires. The stock fender flares had to go Whodini or i wouldn't make it around the block with the wheels sticking out a mile. The Bushwacker fendes, although a bit pricey, were and are well worth the price considering the cost of being pulled over and having your inspection sticker torn off before your ride gets towed away. If the cop really is a prick, they can remove your plate for being improperly registered. and don't say they can't do it. That its illegal for the cop to take your plates. They can do anything on the side of the road; and you can tell him its illegal all day as its being loaded onto a wheel lift. It cost a buddy of mine almost $5000 to appeal that one, and he still had to pay the tow fees' and storage. Why do I know know so much about this?And if your rig gets towed in Mass for improper equiptment/safety/Non DOT items that if removed on the spot would make it impossible to drive. You must bring it back to street legal and bring it to s special DOT/State police inspection to ensure its highway safe. Its like the inspection they give you if you buy back your car after a total loss accident and they need to give you a new state issued VIN Number. they can also change the type of vehicle it is. They can change it from Passenger to whatever. Affecting your excise taxes and registration and insurance costs.As long as the tire is covered and it looks proper, you won't catch any shit from the local Constabulary most of the time.
This is a 5 inch lift. When I was finished it was up to 7 inches and I ran the 35's all the time. At that height the 33's looked like skateboard wheels! I like steel rims over alloy anyway. They are cheaper and lighter. I will putting them on my Rubi when I buy new tires.

I did get pulled over at a DOT Stop because of the height on my bumper was way over the limit for the lift calculation. Luckily I had a cool cop who appreciated the work I put into it and the money I spent on keeping all the steering and axle mods as close to stock height as I could by welding in CA drops. He never wrote me up for the bumper height because of those mods.


How do I know this happens all the time/ the removal of plates for "safety" towing and impounding?



Because I was the Guy that had to remove them!


I lost 90 lbs since then. thank God! If i got any bigger i could have towe for the Fake Repo Shows like "Lizard Lie, I mean Lick" and "Miami Tows"
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Old 06-26-2015, 11:43 AM   #48
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Running spacers puts more load on the hub, bearings, than offsetting the rim. because it is moving the weight center further from the hub.
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Old 06-26-2015, 11:46 AM   #49
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Running spacers puts more load on the hub, bearings, than offsetting the rim. because it is moving the weight center further from the hub.
Having dust on your tires puts more load on the hub also because the tire weighs more. The question is, is it enough to ever notice or worry about.
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Old 06-26-2015, 12:57 PM   #50
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Having dust on your tires puts more load on the hub also because the tire weighs more. The question is, is it enough to ever notice or worry about.
I don't have evidence to back it up, but I would agree with you. If we're comparing "properly back spaced" wheels vs wheel spacers that give you the same effective back spacing, the only thing that is changing is the location of the weight of the wheel center. The rest of the wheel and the tire are in the same location. I don't know that moving the wheel center 1.5" would drastically effect anything.

It's my understanding that the bad rep spacers get is from the old style lug centric spacers. Those were dangerous. Hub centric spacers are safe when used and maintained correctly. That's my $0.02 anyway!

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