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Old 02-13-2012, 02:09 PM   #1
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offset/backspacing for 35' nitto mud grappler

decided to get the nitto mud grappler and 17s (35X12.50X17). the website suggest the ideal width for wheel is 10'. Whats the ideal offset? -44?

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Old 02-13-2012, 02:41 PM   #2
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Originally Posted by bobowrangler
decided to get the nitto mud grappler and 17s (35X12.50X17). the website suggest the ideal width for wheel is 10'. Whats the ideal offset? -44?
Stick with a 8" wide wheel.

That website is for street cars, not for offroading.

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Old 02-13-2012, 03:38 PM   #3
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Quote:
Originally Posted by IndyJeepMan

Stick with a 8" wide wheel.

That website is for street cars, not for offroading.
I thought the minimum you can go on a 315 is a 8" wide wheel
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Old 02-13-2012, 04:09 PM   #4
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Originally Posted by IndyJeepMan View Post
Stick with a 8" wide wheel.

That website is for street cars, not for offroading.
^^^ This.

A skinnier rim will give you more leeway to air down offroad.

And the Nitto MG on a 17" wheel is gonna be like toting an anvil on your tire carrier. You're also gonna get killed on mpg's and power loss. Plan accordingly.
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Old 02-13-2012, 04:15 PM   #5
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Also, now that I think about it...

You want a bs of 4.5" or less. The smaller the bs #, the more the wheel stick out from the Jeep.

Forget offset.

Here's an equation to convert offset to bs:


Take offset, divide by 25.4, then add the overall rim width (rim width +1) divided by 2

so: 17x8 with -44 mm offset
-44mm / 25.4 = -1.73" + (((8"+1")/2)= 4.5") = 2.77" BS...Which means your wheels will be in Indiana when you're in Illinois. Not a good thing.

Make sense?
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Old 02-13-2012, 04:22 PM   #6
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Originally Posted by kbwwolf
Also, now that I think about it...

You want a bs of 4.5" or less. The smaller the bs #, the more the wheel stick out from the Jeep.

Forget offset.

Here's an equation to convert offset to bs:


Take offset, divide by 25.4, then add the overall rim width (rim width +1) divided by 2

so: 17x8 with -44 mm offset
-44mm / 25.4 = -1.73" + (((8"+1")/2)= 4.5") = 2.77" BS...Which means your wheels will be in Indiana when you're in Illinois. Not a good thing.

Make sense?
Yes!!! I'm finally clear on this! Thank you so much. Can you suggest an ideal wheel that can go with the grappler?
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Old 02-13-2012, 06:09 PM   #7
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Yes!!! I'm finally clear on this! Thank you so much. Can you suggest an ideal wheel that can go with the grappler?
If I could, I'd sell it, and be eating lobster with The Donald tomorrow. If I liked him, which I don't.

Best advice...find a wheel you like (preferably several), and then look at bs. Like I said, you want one with 4.5" or less bs. Don't wanna go too low, though, as tires that stick out too far not only put stress on your bearings, but will paint your Jeep with roadcrap any time you drive in the rain. 4.5" to, say, 3.75" is a pretty safe bet.

Not to mention that, in many states, it's illegal for your tires to exceed the fender width. Most of us don't care (mine are outside the fenders). You only have to worry about Troopers, anyway, as city cops generally got more important things to do.
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Old 02-13-2012, 06:14 PM   #8
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Just to give you an idea, I'm running 315/75R16's (which are 12.5" wide) on 16x8 ATX 188 Teflon wheels.


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Old 02-13-2012, 06:40 PM   #9
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Just to give you an idea, I'm running 315/75R16's (which are 12.5" wide) on 16x8 ATX 188 Teflon wheels.


Attachment 97088

Attachment 97089
looks awesome. whats the bs of your wheel?
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Old 02-13-2012, 08:37 PM   #10
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looks awesome. Whats the bs of your wheel?
4.5"
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Old 02-13-2012, 08:43 PM   #11
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4.5"
hehe one more question, what kind of spare carrier you got?
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Old 02-13-2012, 11:10 PM   #12
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hehe one more question, what kind of spare carrier you got?
In the photo, a Smittybilt Oversize tire carrier. Adequate for the moment, but not long term.

Smittybilt 2743 - Smittybilt Oversized Tire Carrier in Black for 07-12 Jeep® Wrangler & Wrangler Unlimited JK - Quadratec

This Spring I'm gonna install an OR-FAB, which will shift the weight to my tailgate hinges.

OR-FAB 85208BB - OR-FAB Swing-A-Way Tire Carrier for 07-12 Jeep® Wrangler & Wrangler Unlimited JK - Quadratec
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Old 02-14-2012, 10:41 PM   #13
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4.5"

So with that amount of backspacing, no offset and 12.5" wide wheel, you have no issues with your steer tires rubbing against anything?

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