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Discussion Starter · #1 · (Edited)
Figured I would start a thread about aftermarket wheels. Show us what you have, tell us what size and offset, and what is your new width.
For some reason aftermarket wheels always seem to make the machine wider, even when buying the same offset as OEM wheels. They added 2" in total width on my Polaris 850 XP, 50" compared to the OEM 48", and 4" in total width on my KRX. , 72" compared to the OEM 68". I suspect that my spring sag contributes to part of that extra width. Maybe as much a 2" I would guess. Fortunately the extra width does not hurt me at all. My trailer is 80" wide and trails here in Colorado are pretty much un-restricted by width. Anywhere 68" wide fits, 72" will fit as well.
I put Tusk 5+2 wheels and BFG KM3 tires on the KRX. OEM wheels are supposed to be a 6+2, so the +2 offset on mine in theory should have kept my overall width the same. I used a straight edge along the bottom of the rear tires to get my measurements, so any tire bulge would be included. I never measured the OEM setup, just going with what Kawasaki claims.
Has anyone measured their width with the OEM setup?

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Discussion Starter · #2 ·
My before and after shots from the rear.

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Pretty much all OEM wheels are +1 offset. So you have to look for +1 to keep the same width. There are some out there but not many.
 

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Discussion Starter · #7 ·
Your after shot has a lot more weight on the car and it shows in your suspension sagging. Time to add some more preload.
LOL. I don't have much left to add...
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Discussion Starter · #8 ·
Pretty much all OEM wheels are +1 offset. So you have to look for +1 to keep the same width. There are some out there but not many.
This is what I have found on the OEM wheels. Guess I could go downstairs in a bit and measure mine.
"The 2020 KRX 1000 comes stock with 8-ply rated MAXXIS Carnivore 31x10R15 tires on Kawasaki 15×7 (5-2 offset) aluminum alloy bead-lock wheels featuring Lime Green rings."
 

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Discussion Starter · #9 ·
Okay, I just pulled out one of my OEM wheels and a tape measure. It is NOT a 5+2. (so my above quote is incorrect) It's a 15x8 wheel with a bit of an odd offset according to my measurements. It measures at a 6-1/4 + 1-3/4 offset. Maybe 6-1/2 x 1-1/2. kind of tough to measure with the tire mounted on it.
 

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Figured I would start a thread about aftermarket wheels. Show us what you have, tell us what size and offset, and what is your new width.
For some reason aftermarket wheels always seem to make the machine wider, even when buying the same offset as OEM wheels. They added 2" in total width on my Polaris 850 XP, 50" compared to the OEM 48", and 4" in total width on my KRX. , 72" compared to the OEM 68". I suspect that my spring sag contributes to part of that extra width. Maybe as much a 2" I would guess. Fortunately the extra width does not hurt me at all. My trailer is 80" wide and trails here in Colorado are pretty much un-restricted by width. Anywhere 68" wide fits, 72" will fit as well.
I put Tusk 5+2 wheels and BFG KM3 tires on the KRX. OEM wheels are supposed to be a 6+2, so the +2 offset on mine in theory should have kept my overall width the same. I used a straight edge along the bottom of the rear tires to get my measurements, so any tire bulge would be included. I never measured the OEM setup, just going with what Kawasaki claims.
Has anyone measured their width with the OEM setup?

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View attachment 1838
I have the same tusk wheels as you Bob and now pull on my toyup rack that’s 72” wide tires just clear.. with stock tires and wheels had a tad over 3” extra room overall.. so yea didn’t see that coming! Thought they sent me the wrong wheels at first..
 

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You can generally tell offset just by looking at the wheel.

+1 wheel = no lip
+2 wheel = ~1” lip
+3 wheel = ~2” lip

stock wheel obviously has no outer lip
 

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Discussion Starter · #12 ·
From the back side you can measure the width of the wheel, then measure from the mounting surface to the back of the wheel, then subtract that from the wheel width. That will tell you the offset. The OEM is not a +1 offset.
 

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You should be measuring backspacing. Offset is a different formula that is figured out from the wheel center-line. The thickness and design of the specific wheel along with the area the bead of a tire will seat are all variable of offset. Backspacing is straight forward.

It is important to try not to put wheels that stick out wider than factory, provided factory have figured out the best geometry which is usually the case. When you put wheels that are stick out further this puts leverage which equates to stress on components and then handling characteristics will change for the worse. In sand alone/only, this is not much of an issue. In high speed desert or slow rock crawling this can run into issues.
This is for off road applications only. It is completely different for on road.

Dynatrac, Shock Therapy, and Fusion 4x4 all have in depth video explanations of this.

IMO, the KRX factory bead locks are as good as it gets for many reasons and I am not one to leave factory things alone.
 

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When my carnivores wear out I'm going to use the stock wheels and add the KM3 32" tires to the machine. Only will change out the wheels if it gets damaged.
 

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What are the size of the oem wheels, so i know which after market will fit just like the oem? The oem backspace and pattern? It isn't clear to me above, lot of numbers floating aroud. I'd prefer to do as above and use oem wheels, but if i stumble onto a package at all these utv shows, would like to be prepared.
 

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Wanting a new set of rims that retain oem geometry, are we all in agreement that oem rims are 7" 5+2?
 

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Discussion Starter · #19 ·
My 7" 5+2 wheels have me over 70" wide. I don't know of an aftermarket wheel that will keep you at 68" wide. Not saying there aren't any, but I haven't seen them.
 

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No, a stock wheel is NOT 5+2. You need an X +1 offset wheel to retain stock width. Not many wheels out there with +1 offset but there are some.
 
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