Anyone with the BFG KO2 39x13.5r17?

[bleda2002]

Not that I care, but if airing that tire down made a big difference it should be off by 4-6 inches based on how much air they let out. The difference here is more that when aired up it stretches the tire a bit so that its off by an inch or less. One rotation = the circumfrence of the tire no matter the pressure (unless basically flat) and that doesnt change with the axle height, the tire just becomes more of an oblong.

Easiest way to check this is just get a seamstress tape, wrap it around the tire, start deflating, see if you are losing 3.14 inches of circumfrence for every inch down the axle goes (hint, the tire doesnt keep shrinking after it loses its crowning).

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[polarisTXguy]

Looking high and low for the km3 version . No luck . Currently on 38" trail graps . Any leads appreciated . Thanks

39 KM3's plus multiple other size KM3's are on national back order until November ish

 

[Levi.Butler]

Do you really think that slight difference equates to being able to run an aired down 40 next to an aired up 35?

School us, teach.

If you would like, my wife has a JLUR on stock tires sitting next to my Gladiator on 39s and I still have the 37s sitting in the garage. San Antonio isn't far, you can come use my driveway.

 

[BLK HOLE]

39 KM3's plus multiple other size KM3's are on national back order until November ish

I have those on my other Jeep. I really like them. A tad surprised at how easily I lose chucks of the tread in the rocks tho. They're def louder than I'd like, which I why I went KO2 on the JT.

 

[BLK HOLE]

Do you really think that slight difference equates to being able to run an aired down 40 next to an aired up 35?

We aren't discussing 35s to 40s. We are discussing the need to drop 4-6" on a tire much larger than those. That tire dropped 1-2 right there.

 

[Levi.Butler]

We aren't discussing 35s to 40s. We are discussing the need to drop 4-6" on a tire much larger than those. That tire dropped 1-2 right there.

The forum post you attempted to cite in order to prove your point, discussed exactly 35s and 40s.

I'll use your equation from before:

Bottom radius of my 39s = 19"
Effective diameter = 38"
Circumference = 38x3.14 (π) = 119.32"

If we air down enough to drop the axle 1.5" based on "That tire dropped 1-2 right there." the math changes to this.

Bottom radius of my 39s = 17.5"
Effective diameter = 35"
Circumference = 35x3.14 (π) = 109.9"

Does the screen shot you provided look like ANYWHERE close to a difference of 10" in circumference?

Just stop. Stop trying to prove a stupid point... and stop providing bullshit advice to people on the internet because apparently people (like you) just believe what they read on the internet without attempting to verify in the real world.

 

[duvinclunk]

39 KM3's plus multiple other size KM3's are on national back order until November ish

Woah! Where did you hear that it wouldn't be available until November?

 

[BLK HOLE]

The forum post you attempted to cite in order to prove your point, discussed exactly 35s and 40s.

I'll use your equation from before:

Bottom radius of my 39s = 19"
Effective diameter = 38"
Circumference = 38x3.14 (π) = 119.32"

If we air down enough to drop the axle 1.5" based on "That tire dropped 1-2 right there." the math changes to this.

Bottom radius of my 39s = 17.5"
Effective diameter = 35"
Circumference = 35x3.14 (π) = 109.9"

Does the screen shot you provided look like ANYWHERE close to a difference of 10" in circumference?

Just stop. Stop trying to prove a stupid point... and stop providing bullshit advice to people on the internet because apparently people (like you) just believe what they read on the internet without attempting to verify in the real world.

First its wasn't true...then it was, but it doesn't make enough of a difference. You're learning as you go here.

 

[Levi.Butler]

First its wasn't true...then it was, but it doesn't make enough of a difference. You're learning as you go here.

You're so dense.

It's not true, never has been, never will be. The math you provided doesn't equate to the screenshot you took. The screenshot and your admission that "That tire dropped 1-2 right there." actually prove your math to be WILDLY incorrect.

If the theory you're attempting to use worked and we look at that screen shot and use your own words "That tire dropped 1-2 right there.", then just how far would you have to air down in order to account for difference in circumference between a 37 and a 39?

The difference in the circumference is (39-37)*3.14 = 6.28. If "That tire dropped 1-2 right there." = <1 inch of the ACTUAL rolling CIRCUMFERENCE then you would have to air down your tire enough enough to cover a difference of 6.28 of circumference so 6.28/1.5 = 4.187

Does that sound like it jives with this garbage you spewed earlier?

Bottom radius of my 39s = 19"
Effective diameter = 38"
Circumference = 38x3.14 (π) = 119.32"

For 37s I'll estimate, since I don't have them anymore (on the ground) -
Radius = 18"
Diameter = 36"
Circumference = 36x3.14=113.04"

For purposes of this exercise I need to just lower the pressure enough to get the rolling radius to 18". I've provide a link that will offer some education. Altho you've proven to be quite resistant to learning.

Like I said before... stop with the fake news, dumb fucks like you, blindly believe the things they read on the internet.

 

[BLK HOLE]

You're so dense.

It's not true, never has been, never will be. The math you provided doesn't equate to the screenshot you took. The screenshot and your admission that "That tire dropped 1-2 right there." actually prove your math to be WILDLY incorrect.

If the theory you're attempting to use worked and we look at that screen shot and use your own words "That tire dropped 1-2 right there.", then just how far would you have to air down in order to account for difference in circumference between a 37 and a 39?

The difference in the circumference is (39-37)*3.14 = 6.28. If "That tire dropped 1-2 right there." = <1 inch of the ACTUAL rolling CIRCUMFERENCE then you would have to air down your tire enough enough to cover a difference of 6.28 of circumference so 6.28/1.5 = 4.187

Does that sound like it jives with this garbage you spewed earlier?



Like I said before... stop with the fake news, dumb fucks like you, blindly believe the things they read on the internet.

And you type a lot for a guy that said he wasn’t going to respond anymore.

*stopped reading your comments like 3 posts ago.

 

[polarisTXguy]

Woah! Where did you hear that it wouldn't be available until November?

I’m in an industry tied closely with all things off-road. I tired to secure 39 KM3 for my JT and told it would most likely be late Q4 2022 for additional stock outside of what might actually in still in store at select retailers due to National Back Orders on outstanding orders

 

[BLK HOLE]

I’m in an industry tied closely with all things off-road. I tired to secure 39 KM3 for my JT and told it would most likely be late Q4 2022 for additional stock outside of what might actually in still in store at select retailers due to National Back Orders on outstanding orders

What’s makes KM3s more rare than KO2s? Are they not manufactured as much?

ordered my 39” KO2s in Jan and just got them last week. My KM3s took a week but that was a year ago lol

 

[polarisTXguy]

What’s makes KM3s more rare than KO2s? Are they not manufactured as much?

ordered my 39” KO2s in Jan and just got them last week. My KM3s took a week but that was a year ago lol

Not sure where they are MFG vs KO2 didn’t ask. I picked up my KM3 37 last October luckily they were in stock at the time. Was told by the supplier it would be upward of 10 months at that time. Just tried to order 39’s again last month for EJS in April and told November on new orders.

 

[duvinclunk]

I’m in an industry tied closely with all things off-road. I tired to secure 39 KM3 for my JT and told it would most likely be late Q4 2022 for additional stock outside of what might actually in still in store at select retailers due to National Back Orders on outstanding orders

Woah. That's a bummer. I figured it may be some time but didn't expect that much! I'm also no longer looking for the KO2 but will be going KM3.

 

[CoWhiteGladiator]

Woah. That's a bummer. I figured it may be some time but didn't expect that much! I'm also no longer looking for the KO2 but will be going KM3.

Anyone else with experience with this tire?

I got some 39" ko2 put on my truck and I wheeled it last weekend with them and they did great! no issues. My sister has the milestar patagonias and I did before too but I had no issues last weekend and my sister spun a little tire I didn't. But I love them on the road and off-road they do great as well.

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