New BFGoodrich All Terrain T/A KO2 (1 Viewer)

[BMThiker]

unmounted height of almost exactly 33.5" from lug tip to lug tip

Does this mean not installed on a wheel OR not bolted to the hub and unladen? Those are very different scenarios and I would expect different measurements in each case.

 

[Bama80]

@BMThiker his measurement was on unmounted (no wheel) tire laying on it's side. After perusing multiple forums and threads, it seems these tires generally run smaller than advertised with varying degrees of deviation depending on the size. For example, most of the 34x10.5-17s measured to 32.25" and 37s seem to consistently measure to 35.5" once mounted on the Jeeps. I hate referencing the heep forums which is why I was posing the question on here, bc the responses are typically more thorough and (obviously) more applicable to our trucks.

 

[ssyork]

I'm away for the weekend, but I have a set of ko'2,315's, brand new, mounted on stock fj80 aluminum wheels sitting at home in the garage. I can measure Monday when I get home.

Sent from my SM-G900V

 

[BMThiker]

I'm no tire professional, but I'd think that an unmounted tire would measure smaller than a mounted one with 40 psi. Many people call 315/75/16 a "35 inch tire" but in reality it never was or will be. It's basically the largest size I can run without doing some major body chopping and I've been running this size for about 5 years. Hope that's helpful.

This unbiased tire calculator site spit this out (265 is my stock tire size):
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
265/75-16_____7.8in_____15.8in_____31.6in_____99.4in_____637_____0.0%
315/75-16_____9.3in_____17.3in_____34.6in_____108.7in_____583_____9.3%

 

[ssyork]

Got home late will measure in the morning, didn't forget though

Sent from my SM-G900V

 

[ssyork]

So here they are, the 315's, right at 34.5 ". They have 45 psi, nitrogen in them and it's 25* outside.

Sent from my SM-G900V

 

[woody]

So here they are, the 315's, right at 34.5 ". They have 45 psi, nitrogen in them and it's 25* outside.

I have to ask...nitrogen? I get the advantages for the daily driver crowd, but unless you CARRY nitrogen to air back up following an offroad trip, it seems like a waste of money...

 

[hamishpotter]

question - anyone driving these in the rain hydroplaning a lot? I could see that being a reason to go with an AT that has a more linear vertical tread break to channel water. the KO2's don't seem to have that. my Duratracs like to dance in the rain above 50mph (which I don't like to do)

 

[ssyork]

I have to ask...nitrogen? I get the advantages for the daily driver crowd, but unless you CARRY nitrogen to air back up following an offroad trip, it seems like a waste of money...

Costco, they fill them all with it. I wouldn't pay extra. It will get mixed with air when I start taking the cruiser out this summer.

Sent from my SM-G900V

 

[JaketheSSnake]

I put some on my 3500 drw Silverado last week and they've been absolutely amazing in the snow and ice. The tires they replaced were so bad they were dangerous, so its not the best comparison lol.

Now that I'm looking at tires for my cruiser, I thought I'd try something different, leaning more towards an MT. It looks like everything decent in a 315 us $250+ online. The ko2s have a rebate putting them just under $200, free shipping. It's too good of a deal to pass up.

 

[BMThiker]

question - anyone driving these in the rain hydroplaning a lot? I could see that being a reason to go with an AT that has a more linear vertical tread break to channel water. the KO2's don't seem to have that. my Duratracs like to dance in the rain above 50mph (which I don't like to do)

I've noticed that I can't hit deep puddles as confidently as I could with the KM2s.

 

[Stuparman]

I've got this strange cracking pattern going all the way around the center of several of my tires. Little over 5k miles on them at this point, is this an issue? The depth of the cracks vary, some are almost all the way through the tread. I'm concerned about chunking. Already sent off an email to BFG to see what they have to say.

 

[BMThiker]

Could lots of brined roadways contribute to this?

 

[Stuparman]

We are sorry to hear you are having a tread-cracking / splitting issue with KO2 tires on your Land Cruiser.

Tread cracking is commonly related to ozone interaction with rubber (can be other causes), but depending on the severity, it may only be a cosmetic issue that does not affect tire performance or safety. Unfortunately, we won't be able to determine what exactly caused the tread to crack without having the tires inspected by an authorized BFGoodrich tire dealer.

We recommend taking your vehicle to selected tire dealer for an inspection (preferably at the selling retailer).

The dealer is trained to examine the tires and determine if any action is required. After inspecting the tires, the dealer will advise you if the condition requires the tires to be replaced. If so, the selling retailer or authorized tire dealer has full authority to extend the appropriate credit under the terms of the warranty.

If you or the dealer has any questions during the inspection process, please have them call us at the number below. To find participating dealers in your area, you can use our Dealer Locator page at www.bfgoodrichtires.com/dealer-locator/dealer-locator.page.


We appreciate your business and thank you for choosing BFGoodrich.

It is our goal to ensure that your issue has been resolved or your question answered to your satisfaction. If we can assist you further, please respond to this email or call us at 1-877-788-8899 (toll free) between 8:00AM and 8:00PM Eastern Time Monday through Friday or between 8:30AM and 4:30PM Eastern Time on Saturday.

Guess I'll have to head back to Discount and see what they have to say.

Could lots of brined roadways contribute to this?

No salt on the roads here. I do drive a lot of dirt roads aired down, not sure if that'd cause this.

 

[george_tlc]

Nearly looks like someone siped them...

cheers,
george.

 

[Stuparman]

Nearly looks like someone siped them...

cheers,
george.

That's what the tire shop said. They look siped in the wrong direction. They'd never seen it before, and when they called BFG they couldn't get any answers there. They offered to replace them and cover 90% of the new tires cost.. I decided to just run with it for now, doesn't seem to effect anything.

 

[george_tlc]

Pretty strange/suspicious. Given they are new tyres (relatively), I can't imagine them 'cracking' and some of those cuts seem to run from one block down to the next (from your picture).

Siping is really hard to see on a new tyre. I wonder if some galah had a go at siping, then realised they'd screwed up and returned the tyres as 'new'... and then they get sold to you. You would never notice siping since on a new tyre it is a clean razor slit - even now you can barely see them unless you pull the blocks apart or look really closely.

Just too weird...

cheers,
george.

 

[Stuparman]

I didn't notice it until I had a few thousand miles on them. I just rotated in my spare, bought at the same time. Waiting to see if it turns up there as well.

I should have improved grip on offcamber ice now right?

 

[honk]

If they said that it could be related to ozone they're admitting that they're engineers are either cheaping out or just dropping the ball entirely. In other words it's BS to say that.

Ozone cracking in tires is something that was a problem in tires long ago but there are many preventative measures that are and should be part of tire designs these days, and since 1945 or so, maybe earlier.

 

[mcgaskins]

I pulled the trigger on 37" KO2s this week, and I have to say I love them. Extremely smooth and great manners on the road - hoping to test them off road very soon.