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Old 01-09-2018, 01:57 PM
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Stock Wheels with 37x12.50x17

I know ideally I should buy new wheels and I do plan to do that in the future but I am thinking about just running spacers for now.

I am putting on 37x12.50x17 tires. I will have a 3.5" Metalcloak lift. I am trying to decide what spacers I should run and what it might look like.

Anyone running spacers on this type of set up? What are you using? Any pics?

Thanks in advance for any info or photos.

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Old 01-09-2018, 02:05 PM   #2
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I would say if you will run stock wheels, 1.5" spacer.

As for mounting that tire on the stock rim, take a look at the tire manufacturers specs, as to what the min and max rim widths can be used with that sized tire.

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Old 01-09-2018, 02:09 PM   #3
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Some people are going to tell you to run 1.5" spacers. For 35s that's fine but the taller 37 will definitely give you some rub on the frame/control arm at full turn. You want to run around 3.5" of total backspacing. That would equate to 3" spacers on each side which I don't recommend. The right way to do it is to get new wheels the appropriate backspacing or a combination of new wheels and spacers. Most beadlocks have the 3.5" backspacing you need. If you don't want to run a beadlock a regular wheel with 4.75" of backspacing along with spacers will work fine. The adding washers to the steering stop crap im not a fan of as you would have to add a lot of washers reducing your turning radius quite a bit
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Old 01-09-2018, 02:18 PM
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Originally Posted by jestersix View Post
I would say if you will rung stock wheels, 1.5" spacer.

As for mounting that tire on the stock rim, take a look at the tire manufacturers specs, as to what the min and max rim widths can be used with that sized tire.

8.5-11 is the approved rim width according to the tire's website.
They are Mastercraft MXT
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Old 01-09-2018, 02:20 PM
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Originally Posted by monte417 View Post
Some people are going to tell you to run 1.5" spacers. For 35s that's fine but the taller 37 will definitely give you some rub on the frame/control arm at full turn. You want to run around 3.5" of total backspacing. That would equate to 3" spacers on each side which I don't recommend. The right way to do it is to get new wheels the appropriate backspacing or a combination of new wheels and spacers. Most beadlocks have the 3.5" backspacing you need. If you don't want to run a beadlock a regular wheel with 4.75" of backspacing along with spacers will work fine. The adding washers to the steering stop crap im not a fan of as you would have to add a lot of washers reducing your turning radius quite a bit

Oh yeah, 3" spacers are way more than I would consider running.
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Old 01-09-2018, 02:43 PM   #6
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Oh yeah, 3" spacers are way more than I would consider running.
Assuming you are running stock Rubicon wheels, that is a 17x7.5 wheel, 1" less than the manufactures specs.

I know people who run 12.5 on 7.5 wheels. I personally would not do it, but there are people out there who do, and seem to not have issues.
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Old 01-09-2018, 02:48 PM
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Originally Posted by jestersix View Post
Assuming you are running stock Rubicon wheels, that is a 17x7.5 wheel, 1" less than the manufactures specs.

I know people who run 12.5 on 7.5 wheels. I personally would not do it, but there are people out there who do, and seem to not have issues.
Thanks for the info. I really like the look of the Rubicon wheels but I guess I will just have to buy some after market wheels. I don't want to be unsafe or anything.

So, most of the aftermarket wheels I have been looking at have a 4.5 inch backspace. That means I would need those along with spacers?
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Old 01-09-2018, 02:55 PM   #8
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Thanks for the info. I really like the look of the Rubicon wheels but I guess I will just have to buy some after market wheels. I don't want to be unsafe or anything.

So, most of the aftermarket wheels I have been looking at have a 4.5 inch backspace. That means I would need those along with spacers?
If you like the look of the Rubicon wheels, quadratec sells a similar wheels, with better specs for what you are looking to achieve:

https://www.quadratec.com/products/92615_24X5_PG.htm
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Old 01-09-2018, 03:43 PM   #9
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Originally Posted by jwheeler331 View Post
I know ideally I should buy new wheels and I do plan to do that in the future but I am thinking about just running spacers for now.

I am putting on 37x12.50x17 tires. I will have a 3.5" Metalcloak lift. I am trying to decide what spacers I should run and what it might look like.

Anyone running spacers on this type of set up? What are you using? Any pics?

Thanks in advance for any info or photos.


1.5Ē spacers


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Old 01-09-2018, 03:44 PM   #10
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Stock Wheels with 37x12.50x17

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ID:	3880977 4.75 backspacing which is the same as stock 6.25-1.5=4.75 and I have 2.5Ē teraflex coil lift with 37x12.5r17 goodyear mtrís and I donít get any rub (mine was only slight rub up front after 95% turning which no one ever turns 100% but then I put on 8 alpine arms and get NOO rub,the mc lift Iím sure comes with arms to center your wheels)as you definitely will not with a 3.5Ē lift which is a huge lift for 37Ē tires with flat fenders!at least run a full size 37Ē tire like gy mtrís or else those 37ís will really look tiny with that much lift!Click image for larger version

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Old 01-09-2018, 03:59 PM   #11
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Originally Posted by jwheeler331 View Post
I know ideally I should buy new wheels and I do plan to do that in the future but I am thinking about just running spacers for now.

I am putting on 37x12.50x17 tires. I will have a 3.5" Metalcloak lift. I am trying to decide what spacers I should run and what it might look like.

Anyone running spacers on this type of set up? What are you using? Any pics?

Thanks in advance for any info or photos.


3.5Ē Metalcloak lift with small 37Ē bfg m/tís.Click image for larger version

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Old 01-09-2018, 04:12 PM   #12
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Stock Wheels with 37x12.50x17

My 17x8.5 method holes with 4.75 backspacing.Click image for larger version

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Old 01-09-2018, 05:41 PM   #13
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I run what you are looking at doing. I have the MC 3.5" lift with 37*12.5*17 on stock wheels. I used 1.75" wheel spacers.









I have some more pics over on my build thread.
https://www.wranglerforum.com/f314/co...d-2208217.html

I've been running these since June or so. I ran 12.5"s on my TJ Rubicon's stock wheels as well for about 4 years.
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Old 01-09-2018, 05:49 PM   #14
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Just an FYI. With 4.5 inches of backspacing and everything aligned correctly, 37"s don't rub. You won't want to air the up as high as you did on the stock tires. I run around 25 - 28 psi in mine.
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Old 01-09-2018, 06:48 PM   #15
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And that depends what tires you have. True size 37x12.50x17 Pitbull Rocker will rub at full lock unless you have 4Ē BS.


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Old 01-09-2018, 07:33 PM   #16
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Stock Wheels with 37x12.50x17

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And that depends what tires you have. True size 37x12.50x17 Pitbull Rocker will rub at full lock unless you have 4Ē BS.


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I know Goodyear mtrís are full size and EVERYONE says the pit bull rockers run small????i wouldnít know since I donít own 37Ē pit bull rockers but thatís what Iíve read,google it!


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Old 01-09-2018, 07:44 PM   #17
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Attachment 3880977 4.75 backspacing which is the same as stock 6.25-1.5=4.75 and I have 2.5Ē teraflex coil lift with 37x12.5r17 goodyear mtrís and I donít get any rub (mine was only slight rub up front after 95% turning which no one ever turns 100% but then I put on 8 alpine arms and get NOO rub,the mc lift Iím sure comes with arms to center your wheels)as you definitely will not with a 3.5Ē lift which is a huge lift for 37Ē tires with flat fenders!at least run a full size 37Ē tire like gy mtrís or else those 37ís will really look tiny with that much lift!Attachment 3880985


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3.5 and flats is fine on 37s. May be a bit tall for 35s. Some of us like having up travel and decent approach and departure angles.


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Old 01-09-2018, 11:25 PM   #18
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Stock Wheels with 37x12.50x17

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I know Goodyear mtrís are full size and EVERYONE says the pit bull rockers run small????i wouldnít know since I donít own 37Ē pit bull rockers but thatís what Iíve read,google it!


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The 37" Pitbull Rockers by no means run small, and are bigger and wider then the MTRs I know for fact. That I don't have to google. If you can run 37 MTRs with 4.75" BS without rubbing it proves my point. Some say the Mastercraft run true by compared to the Pitbull, not a chance.


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Old 01-09-2018, 11:37 PM   #19
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Yeah my STT Pros are like 36.5ish when new. Before I had it aligned the passenger side would rub a bit but hasn't since getting everything dialed in.
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Old 01-10-2018, 12:01 AM   #20
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My 37 Trail Grapplers just kissed the front lower control arms on 17x9 with 4.25 BS. Donít know how you could run 4.75 and have no rub. I now run 3.5 BS and zero rubbing anywhere.


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Old 01-10-2018, 12:39 AM   #21
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I run what you are looking at doing. I have the MC 3.5" lift with 37*12.5*17 on stock wheels. I used 1.75" wheel spacers.









I have some more pics over on my build thread.
https://www.wranglerforum.com/f314/co...d-2208217.html

I've been running these since June or so. I ran 12.5"s on my TJ Rubicon's stock wheels as well for about 4 years.
Stock wheels and 37's look sweet.
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Old 01-10-2018, 05:23 AM   #22
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Ah, a lifted Jeep in its natural habitat!

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Old 01-10-2018, 10:33 AM   #23
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^^^Exactly^^^
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Old 01-10-2018, 11:24 AM
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Thank for all of the replies. For some reason my phone would not let me comment on anything on the site. Had to get back to a computer.

This will be my first lifted jeep. I had a YJ for a while but it was pretty stock as far as suspension and wheels and tires go.

Backspacing is something I don't know much about and even though I have read a few things on it, real world experience will be the key for me. Just trying not to spend money only to find out it was wasted and could have been put to something better.
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Old 01-10-2018, 12:30 PM   #25
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Thank for all of the replies. For some reason my phone would not let me comment on anything on the site. Had to get back to a computer.

This will be my first lifted jeep. I had a YJ for a while but it was pretty stock as far as suspension and wheels and tires go.

Backspacing is something I don't know much about and even though I have read a few things on it, real world experience will be the key for me. Just trying not to spend money only to find out it was wasted and could have been put to something better.


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Old 01-10-2018, 01:42 PM   #26
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The 37" Pitbull Rockers by no means run small, and are bigger and wider then the MTRs I know for fact. That I don't have to google. If you can run 37 MTRs with 4.75" BS without rubbing it proves my point. Some say the Mastercraft run true by compared to the Pitbull, not a chance.


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ID:	3882441different version maybe?the Goodyear mtrís are full size,google is your friend?



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Old 01-10-2018, 02:08 PM   #27
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Stock Wheels with 37x12.50x17

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My 37 Trail Grapplers just kissed the front lower control arms on 17x9 with 4.25 BS. Donít know how you could run 4.75 and have no rub. I now run 3.5 BS and zero rubbing anywhere.


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Mine only rubbed the last 5% of turning which a lot of guys fix with washers on the steering with 4.75 backspacing on the frame only but when I added the 8 teraflex alpine arms?Rubbing is now zero and I didnít have to add washers!any time you lift your jeep the wheel base shortens so my alpine arms got my wheelbase back and thatís why I donít get anymore frame rub.Click image for larger version

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Old 01-10-2018, 02:16 PM   #28
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I run what you are looking at doing. I have the MC 3.5" lift with 37*12.5*17 on stock wheels. I used 1.75" wheel spacers.



















I have some more pics over on my build thread.

https://www.wranglerforum.com/f314/co...d-2208217.html



I've been running these since June or so. I ran 12.5"s on my TJ Rubicon's stock wheels as well for about 4 years.


Looks great!


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Old 01-10-2018, 02:21 PM   #29
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3.5 and flats is fine on 37s. May be a bit tall for 35s. Some of us like having up travel and decent approach and departure angles.


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If I was doing 37Ē tires and a 3.5Ē lift?...Iíd stick with stock fenders but thatís just my taste/personal preference.the blue jeep looks perfect with 37ís and a 3.5Ē lift/stock fenders!


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Old 01-10-2018, 02:26 PM   #30
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Stock Wheels with 37x12.50x17

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Originally Posted by loud0g40oz View Post
My 37 Trail Grapplers just kissed the front lower control arms on 17x9 with 4.25 BS. Donít know how you could run 4.75 and have no rub. I now run 3.5 BS and zero rubbing anywhere.


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3.5 backspacing is a 2.5 backspacing difference from stock 6.25,are you running 15.5Ē wide tires?maybe itís your setup thatís different,I never came close to my control arms?


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