BFG k02 tires

swathdiver · December 22, 2018

On 11/19/2018 at 4:07 PM, MY164X4 said:

Can somebody explain why ko2 is so slippery in the rain with very little throttle straight line or cornering... stop and go.

Tires came with the truck plenty of tread left.

16 SLT, 4wd.

Worse tire in the WORLD...

I've driven through 2 inches of standing water at 80 mph with my KO2s and the truck didn't budge an inch. First problem I see is that your're not running enough air in them and at that pressure barely makes your axle rating. 50 PSI minimum and if they are Ds or Es you can take them higher in the rear when towing or hauling a lot of weight in the bed. You'll wear them out right quick at that low pressure, don't ask me how I know.

GM has different alignment specs for different tires. They do not have specs for KO2s for my truck but this tire did come OE on your K2s so I would look them up and take it to an alignment shop and see what's going on after airing them up to minimum spec.

We've been through all kinds of rain, torrential, can't see barely twenty yards in front and she didn't budge, none of the Stabilitrak or Traction Control features had any need to activate with those tires.

MY164X4 · December 22, 2018

I've driven through 2 inches of standing water at 80 mph with my KO2s and the truck didn't budge an inch. First problem I see is that your're not running enough air in them and at that pressure barely makes your axle rating. 50 PSI minimum and if they are Ds or Es you can take them higher in the rear when towing or hauling a lot of weight in the bed. You'll wear them out right quick at that low pressure, don't ask me how I know.

GM has different alignment specs for different tires. They do not have specs for KO2s for my truck but this tire did come OE on your K2s so I would look them up and take it to an alignment shop and see what's going on after airing them up to minimum spec.

We've been through all kinds of rain, torrential, can't see barely twenty yards in front and she didn't budge, none of the Stabilitrak or Traction Control features had any need to activate with those tires.

Just looked at the tires Load range is D.

So I should inflate to 50 psi?

Current psi 39 all 4 corners.

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TXGREEK · December 22, 2018

Just looked at the tires Load range is D.

So I should inflate to 50 psi?

Current psi 39 all 4 corners.

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You’re fine where you’re at, you’ve got high miles on them which I believe some didn’t realize it. I’ve had KO’s in over 15 SUV’s and trucks, great tires but something about getting 20K miles into them and they’ll loose a lot of wet on road grip. Needless to say, every 1 1/2 years I get new tires but the KO2’s have had a lot of balancing issues as well as vibration issues too and the two pairs I’ve had DID NOT IMPRESS me in the slightest. Best to really really research in addition to forums.

TXGREEK · December 22, 2018

Btw, my Nitto Ridge Grapplers are rated at max 80 psi and I’m running them at 38-40 with excellent wear and comfortable ride.

SS502 · December 22, 2018

11 minutes ago, TXGREEK said:

You’re fine where you’re at, you’ve got high miles on them which I believe some didn’t realize it. I’ve had KO’s in over 15 SUV’s and trucks, great tires but something about getting 20K miles into them and they’ll loose a lot of wet on road grip. Needless to say, every 1 1/2 years I get new tires but the KO2’s have had a lot of balancing issues as well as vibration issues too and the two pairs I’ve had DID NOT IMPRESS me in the slightest. Best to really really research in addition to forums.

Yes, you Sir are exactly correct. If I had I’d have those Grapplers ? on mine. I have the K02 and have been running at 36 psi since installed. The door placard says 35 on stock tires and this is a colder time of the year so 34 is the lowest I’ve seen. I do run with nitrogen, so they stay pretty consistent. They look properly inflated, I have low miles so I can’t speak about wear. I do know they have very good wet weather traction. No vibration at any speed. I don’t tow much (but plan to) so I’m wondering if 36 is too low after reading this thread. I do not pretend to be a tire expert so I take all inputs under considerations. Thanks guys!

Edited December 22, 2018 by SS502
Typo

TXGREEK · December 22, 2018

Yes, you Sir are exactly correct. If I had I’d have those Grapplers [emoji854] on mine. I have the K02 and have been running at 36 psi since installed. The door placard says 35 on stock tires and this is a colder time of the year so 34 is the lowest I’ve seen. I do run with nitrogen, so they stay pretty consistent. They look properly inflated, I have low miles so I can’t speak about wear. I do know they have very good wet weather traction. No vibration at any speed. I don’t tow much (but plan to) so I’m wondering if 36 is too low after reading this thread. I do not pretend to be a tire expert so I take all inputs under considerations. Thanks guys!

Max psi is for towing/hauling purposes. Ridge Grapplers are definitely awesome tires just as I’m sure KO2’s are to others but my tires at 80 psi are rated at 3415 per tire which faaaaar exceeds oem tires which you average your weight all together and go from there. 50 psi is still way overkill for a half ton when running e rated tires

TXGREEK · December 22, 2018

Here ya go Toyo/Nitto

Here’s the site for all the sizes (psi capacity)

https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf

swathdiver · December 23, 2018

6 hours ago, MY164X4 said:

Just looked at the tires Load range is D.

So I should inflate to 50 psi?

Current psi 39 all 4 corners.

Yes! LT Tires are made differently than P-Metrics, the air is what supports the weight and LT tires need more air. 50 PSI minimum. Those fellas running around in the 30s are likely not even at the gross capacity of their axles or barely so.

Through much research with my size, 265-70-17, at 30 psi (which is what my door sticker says for P-Metrics) the load capacity for each tire is just 1715 pounds. 41 psi just exceeds my gross rear axle weight rating (4200) but that is still not enough. They wore out fast until I wised up and listened to the BFG rep who told me to run them at 50 psi in the first place. Now, they are wearing down much better but had I listened in the beginning and not been stubborn, they would have gone 60k miles. I'll be lucky to see 40k now. The tread depth is checked at each rotation. The amount of weight they'll support at a given air pressure is not linear.

The 2500 version of mine with LT says to run them 50 psi up front and 60 psi in the rear (to exceed its gross rear axle weight rating).

Anyhow, the 8 psi over my max axle rating is needed to properly inflate the tire for proper wear and keep the tire temperatures down.

TXGREEK · December 23, 2018

Yes! LT Tires are made differently than P-Metrics, the air is what supports the weight and LT tires need more air. 50 PSI minimum. Those fellas running around in the 30s are likely not even at the gross capacity of their axles or barely so.

Through much research with my size, 265-70-17, at 30 psi (which is what my door sticker says for P-Metrics) the load capacity for each tire is just 1715 pounds. 41 psi just exceeds my gross rear axle weight rating (4200) but that is still not enough. They wore out fast until I wised up and listened to the BFG rep who told me to run them at 50 psi in the first place. Now, they are wearing down much better but had I listened in the beginning and not been stubborn, they would have gone 60k miles. I'll be lucky to see 40k now. The tread depth is checked at each rotation. The amount of weight they'll support at a given air pressure is not linear.

The 2500 version of mine with LT says to run them 50 psi up front and 60 psi in the rear (to exceed its gross rear axle weight rating).

Anyhow, the 8 psi over my max axle rating is needed to properly inflate the tire for proper wear and keep the tire temperatures down.

That’s ridiculous, I’ve owned lots of trucks and SUV’s and never had any BFG at 50psi or more unless I was towing in one of my 3/4 tons and even then would lower back down after I was done towing. I’ve got the Nitto Ridge Grapplers 295/60/20’s and run them all day long at 38 psi with excellent wear and much better comfort for daily driving. Best is for everyone to check their tire manufacturers psi specs.

swathdiver · December 23, 2018

34 minutes ago, TXGREEK said:

That’s ridiculous, I’ve owned lots of trucks and SUV’s and never had any BFG at 50psi or more unless I was towing in one of my 3/4 tons and even then would lower back down after I was done towing. I’ve got the Nitto Ridge Grapplers 295/60/20’s and run them all day long at 38 psi with excellent wear and much better comfort for daily driving. Best is for everyone to check their tire manufacturers psi specs.

My comments were in the context of my tire size and the 275-55-20 that the OP is running. Based on your size and at 38 psi, those tires would not meet the gross axle capacity of a 2500 SUV using that chart above and barely mine own. But, as it is said, to each his own.

TXGREEK · December 23, 2018

My comments were in the context of my tire size and the 275-55-20 that the OP is running. Based on your size and at 38 psi, those tires would not meet the gross axle capacity of a 2500 SUV using that chart above and barely mine own. But, as it is said, to each his own.

[emoji6]

Jimmyc! · December 25, 2018

On 11/19/2018 at 4:49 PM, rkj__ said:

Michelin Defender LTX M/S is the gold standard for on road tires.

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I had the defenders on my 15 and left them on with plenty of tread when I traded for the 18. My issue with them was towing and grooved highways. They’d get pretty squirrelly and did not inspire confidence. One mans opinion of course, you’re mileage may vary.

Edited December 25, 2018 by Jimmyc!

TXGREEK · December 25, 2018

I had the defenders on my 15 and left them on with plenty of tread when I traded for the 18. My issue with them was towing and grooved highways. They’d get pretty squirrelly and did not inspire confidence. One mans opinion of course, you’re mileage may vary.

Same thing happened to me on my DMax with brand new KO2’s, ditched them for Michelin AT2’s, less aggressive but more aggressive than the Michelin Defenders I put on before the KO2’s. Personally, it happens to a lot more people than we all realize. Key factor is air pressure, load them up while towing but decrease for a smoother ride while not towing.

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Mozzer · December 27, 2018

My 2014 Work Truck spec 5.3 1500 came with LTs from new. Door sticker says 38 psi.

I have replaced the 17" steel rims with 18" alloys now & have P rated tyres, P rated were a good bit lighter weight than the LTs & I did do some research before buying P rated AT tyres & the 17" winters to ensure the weight ratings were sufficient (Costco still wouldn't install them as the ViN said it came with LTs).

Most LTs don't come with a mileage warranty & cost a good bit more.

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