The perfect truck tire... noise vs tire life vs fuel milage vs appeara

Sean Neilan · April 22, 2018

Question for y'all with the KO2's. I just got stock size KO2's put on a couple days ago and I swear it feels like I have less resistance in the steering wheel than I did with the SRA's. Did anyone else notice this or is it all in my head? I'm assuming if it's true it's because the higher psi and harder rubber.

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LTeddy · April 23, 2018

Good choice. I have been running the Extreme version of the AT2 on my 2017 2500HD all winter and around 10000 miles and I am impressed with them. They make a bit of noise but absolutely nothing like a Duratrac or a K02 does. Duratracs give me a headache and sucked on everything cold, while the K02's traction also was terrible in subzero weather and they started howling with around 10000 miles of drive time. The AT2's grip on ice even down in the -40F temps we get was still respectable for an all season tire. I went with a 295/60/20 and next time will be bump to a 295/65/20 as I have the clearance and am re-geared to 4.56 anyhow!

Please keep updating on the performance of the at2 extremes I noticed my ko2s decreased quite a bit in winter this year after about 17k miles thought about switching to duratracs after the great reviews but always had my eye on some at2's!

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swathdiver · April 23, 2018

Almost 12,000 miles on my KO2s. Still quiet and still excellent traction in heavy rain. Tire pressures kept a 50 psi now and rotated every oil change, about 5k miles. Tread at 12/32 across each tire and all around.

Grumpy Bear · April 23, 2018

1 hour ago, swathdiver said:

Almost 12,000 miles on my KO2s. Still quiet and still excellent traction in heavy rain. Tire pressures kept a 50 psi now and rotated every oil change, about 5k miles. Tread at 12/32 across each tire and all around.

What lead the choice of 50 psi? Just curious.

swathdiver · April 23, 2018

10 hours ago, Grumpy Bear said:

What lead the choice of 50 psi? Just curious.

BF Goodrich insisted on it. I didn't listen and kept fooling around with lower pressures. 42 psi was the minimum pressure to exceed my rear axle ratings. Started out in the 30s and they were wearing rather quickly. Wear slowed down once in the 40s and became imperceptable once above 48 psi. In addition, I found a door sticker on a Yukon XL 2500 with my sized tires in E, the pressures called for were 50 psi up front and 60 psi for the rears.

SierraHD17 · April 23, 2018

19 hours ago, LTeddy said:

Please keep updating on the performance of the at2 extremes I noticed my ko2s decreased quite a bit in winter this year after about 17k miles thought about switching to duratracs after the great reviews but always had my eye on some at2's!

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I will. I have never run a Toyo in the past I liked but I don't hold grudges so I gave these a whirl. So far so good! I should probably rotate them when I get the truck home again.

Sean Neilan · April 24, 2018

BF Goodrich insisted on it. I didn't listen and kept fooling around with lower pressures. 42 psi was the minimum pressure to exceed my rear axle ratings. Started out in the 30s and they were wearing rather quickly. Wear slowed down once in the 40s and became imperceptable once above 48 psi. In addition, I found a door sticker on a Yukon XL 2500 with my sized tires in E, the pressures called for were 50 psi up front and 60 psi for the rears.

Do you have a 1500 or 2500?

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swathdiver · April 24, 2018

35 minutes ago, Sean Neilan said:

Do you have a 1500 or 2500?

swathdiver · April 24, 2018

For some reason I could not type in that last post, only edit the quote.

Anyway, mine is a 1500 and am running Load Range C stock size KO2 tires, LT265-70-17.

Sean Neilan · April 24, 2018

For some reason I could not type in that last post, only edit the quote.

Anyway, mine is a 1500 and am running Load Range C stock size KO2 tires, LT265-70-17.

Where did you find a pressure chart for them? I've been googling all over and can't find one any where. I've got 275/55r20 D range and I'm running them at 40. Only had em for a few days so far though.

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Grumpy Bear · April 24, 2018

2 hours ago, swathdiver said:

BF Goodrich insisted on it. I didn't listen and kept fooling around with lower pressures. 42 psi was the minimum pressure to exceed my rear axle ratings. Started out in the 30s and they were wearing rather quickly. Wear slowed down once in the 40s and became imperceptable once above 48 psi. In addition, I found a door sticker on a Yukon XL 2500 with my sized tires in E, the pressures called for were 50 psi up front and 60 psi for the rears.

Interesting. Thanks.

swathdiver · April 24, 2018

1 hour ago, Sean Neilan said:

Where did you find a pressure chart for them? I've been googling all over and can't find one any where. I've got 275/55r20 D range and I'm running them at 40. Only had em for a few days so far though.

I did a lot of searching to find them and found another company that posted a chart based on tire size and load range that was the same. Yours was not in that chart but the above link scroll down to the last post on the first page and 1st post on the second page for more detail. You can graph this on excel. At 50 psi my total load capacity is 9880 which is about 1200 pounds more than needed to support my axle rating of 4,200 pounds.

catpartsman · April 24, 2018

I’ve got 295/75-20 Toyo Open Country A/T 2’s. The look is killer for me and road noise is minimal imo. The wear seems to be great too. I have approx 23,000 on them now and have well over half the tread left. I drive 97% road with probably 25% of that on side roads with oil and slag chip base. If you know about this type of road, they eat tires. Traction on wet, dry and snowy roads is great too. MY MPGs dropped about 2-3 MPG with the tire and wheel combo i have now over stock. When needed, I’m going to go back to a smaller tire for less rolling resistance. Plus these sling all kinds of stuff on the side of the truck.

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swathdiver · April 24, 2018

If I were to run your wheels and tires on my truck, 275-55-20 KO2s, they'd have to be aired up to 57-58 psi to equal the 265-70-17 KO2s in BFGs recommended load rating of 2470 lbs per tire @ 50 psi..

Bing3r · April 24, 2018

17 hours ago, catpartsman said:

I’ve got 295/75-20 Toyo Open Country A/T 2’s. The look is killer for me and road noise is minimal imo. The wear seems to be great too. I have approx 23,000 on them now and have well over half the tread left. I drive 97% road with probably 25% of that on side roads with oil and slag chip base. If you know about this type of road, they eat tires. Traction on wet, dry and snowy roads is great too. MY MPGs dropped about 2-3 MPG with the tire and wheel combo i have now over stock. When needed, I’m going to go back to a smaller tire for less rolling resistance. Plus these sling all kinds of stuff on the side of the truck.

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Just a quick question, you said 295/75/20? That seems HUGE to me. My understanding is the second number (the 75) would be a percentage of the width of the tire and that percentage is how much sidewall from the wheel up would be.

Tire calculator came up with a 37.42" tall tire with a width of 11.61". If that is the case and not a fat finger, you should save those MPGs you lost, or atleast most of them, by going with a 295/55/20 tire.