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Tire and Wheel Fitment Guide - 2009 and newer

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Old 07-30-2016, 12:44 PM
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Originally Posted by KOZ45
Specs^^^^^^^^?
2.5 in level in front stock rear 18x10 -24 offset Moto metal 970s 305x65x18 bfg all terrain ko2s
Old 07-31-2016, 09:01 PM
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I think I'm in the right place. I have a stock 13' FX4 and my tires are due and I'm rolling on the fx4 20's. Before I start searching, I discovered my spare is on an 18. Should this be reason for concern if I need to use the spare?

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Old 07-31-2016, 09:41 PM
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Shouldn't be as the 18" spare probably is a taller aspect ratio to make up for the smaller diameter rim. I might not be 100% accurate there but basically the overall diameter of the 20 and the 18 should be about the same.
Old 07-31-2016, 11:21 PM
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Originally Posted by 2011BlueScrew
Shouldn't be as the 18" spare probably is a taller aspect ratio to make up for the smaller diameter rim. I might not be 100% accurate there but basically the overall diameter of the 20 and the 18 should be about the same.
Well I'm on 275/55R20 and the spare is a 285/65R18. The spare is in great shape.

I'm looking at the KO2's and have been reading a lot of guys going 305/55. I'm looking for to get just a small 2" rise and stronger stance. If I throw the spare on it wouldn't be full time. I just want to make sure it won't do damage. This isn't my specialty if you can't tell.
Old 08-02-2016, 07:22 AM
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Originally Posted by Baker362
Went to Discount yesterday. The bfg's are too wide on the 18x7.5. So I'm looking into a set of Moto metal 17x9's. That aside, now that I'm switching down a size, the metrics is confusing me.

Anyone have any input on the fitment of 315 70R17 (34.4x12.4R17) with a 2.5 in. level?
That's the size I have (35x12.50R17). Minor trimming in the front and you'll be fine.
Old 08-02-2016, 03:27 PM
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Originally Posted by Hefe
Well I'm on 275/55R20 and the spare is a 285/65R18. The spare is in great shape.

I'm looking at the KO2's and have been reading a lot of guys going 305/55. I'm looking for to get just a small 2" rise and stronger stance. If I throw the spare on it wouldn't be full time. I just want to make sure it won't do damage. This isn't my specialty if you can't tell.
Sure the spare isn't 275/65/18? Stock is 32", 285/65 is 32.5", 305/55 is 31". Whatever you have or get, try to make them match. Some buy a 5th wheel/tire to replace the spare.
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Old 08-03-2016, 10:01 PM
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You can use this calculator to show you the spec differences between those 2 sizes
https://tiresize.com/calculator/
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Old 08-08-2016, 09:07 PM
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Anyone here running 295/60/20's on a 0 offset wheel? Curious if this would fit my '13 FX4 on Boss Coilovers set to 2.25" of lift.
Old 08-08-2016, 09:10 PM
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Any pics of 17x8.5 wheels with 5" backspacing?
Old 08-08-2016, 10:51 PM
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Are the tuners out there calibrating the speedometer for tire upsize? Or is everyone just riskin' it? Looking at the 5 star tuners. This feature would have me sold. Anyone educated on this?


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