BFG AT KO2

bladz1454 · December 15, 2015

hey guys, i have the shop putting these on today around noon. from what i've read, im thinking blackwalls out and 40 PSI front 36 PSI rear cold?

tyrich88 · December 15, 2015

Yes,the 275/55 18 would be a good 1.5 inches smaller diameter than the factory size. I was wanting a little bigger. According to the calculator 275/65 18 is about half inch taller half inch wider.

I have the 275/70/18 and mileage didn't suffer much at all, and I have a 2" level.

Just did a 5 hour drive yesterday and averaged 18.5 with most of it being at 75 mph

Power didn't suffer either.

tyrich88 · December 15, 2015

hey guys, i have the shop putting these on today around noon. from what i've read, im thinking blackwalls out and 40 PSI front 36 PSI rear cold?

I went white walls out and i love it. And thats about the pressure I run as well.

I am running 38 and 36 currently.

bladz1454 · December 16, 2015

I went white walls out and i love it. And thats about the pressure I run as well.

I am running 38 and 36 currently.

Just picked it up, had them go with stock 275/55/20 sizes and 40 psi front 38 psi rear. Is it weird that coming from stock SR-A tires the KO2s feel flat? Should I jack up the PSI? It just feels really slow/grippy off the line and harder to turn, also a noticeable sound increase at cruising speed.

Edited December 16, 2015 by bladz1454

tyrich88 · December 16, 2015

Just picked it up, had them go with stock 275/55/20 sizes and 40 psi front 38 psi rear. Is it weird that coming from stock SR-A tires the KO2s feel flat? Should I jack up the PSI? It just feels really slow/grippy off the line and harder to turn, also a noticeable sound increase at cruising speed.

That is weird. Mine feel great. Maybe just play with the pressure a bit. It took me a while to get mine down the way i wanted.

These are much quieter than the KO's i had before.

You'll find the sweet spot. Just may take some time.

Badass69 · December 17, 2015

I have 18s but run 40 all the way around and they don't feel odd nor look squashed. In my case it's a 10 ply tire.. the stiff sidewall helps lol.

Sent from my SM-G900W8 using Tapatalk

bladz1454 · December 18, 2015

Just received this response after reaching out to BFG...

I asked (they knew it was a 2014 GMC Sierra from the questionnaire):

I just put BFG KO2s 275/55/20's on my truck and have no idea what PSI to go with. My truck is the 4WD Crew Cab Short Bed, I am currently running them @ 39 in the front and 37 in the back cold (compared to the 32 PSI my stock P tires called for) and they still feel kind of flat. Any suggestions?

They answered:

Drew, I will be happy to assist you. When installing a different size than the original equipment tire, all vehicle manufacturer specifications must be maintained. The replacement tire should be inflated to provide the same load capability of the original tire size at the manufacturer’s recommended pressure.

The original tire size can hold 2,105 lbs at 32 psi.

The new tire will need to meet or exceed the weight. We recommend that the new All-Terrain KO2 LT275/55R20 use 50 psi to hold 2,270 lbs.

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.

Sincerely,

Natasha
Consumer Care Department
Certified BFGoodrich Product Expert

Looks like I will be going up to 48-50PSI today after work!

Edited December 18, 2015 by bladz1454

JRL1164 · December 19, 2015

So basically whatever the load rating is on the door jam compared to the spec chart on their website is what the correct psi should be run then.

Haus_Z71 · December 19, 2015

I wish the KO2 had better tread depth. Only 15/32 compared to the KO 17/32.

bladz1454 · December 21, 2015

So basically whatever the load rating is on the door jam compared to the spec chart on their website is what the correct psi should be run then.

Where did you find a spec chart on their site?

JRL1164 · December 21, 2015

Where did you find a spec chart on their site?

That was my bad, I looked and couldn't find it. May have been Nitto I had looked at. But one of them had a load chart.

Edited December 22, 2015 by JRL1164

1jeds · December 22, 2015

Has anyone put the KO2 on a 305/65/18 with a level? I know a member here had the original KOs at that size on stock wheels. According to BFG tire specs, the KO2 measures a little shorter, so I'm thinking it should fit.

bcbz71 · December 23, 2015

Has anyone put the KO2 on a 305/65/18 with a level? I know a member here had the original KOs at that size on stock wheels. According to BFG tire specs, the KO2 measures a little shorter, so I'm thinking it should fit.

+1....I'm interested in this answer as well. After searches on this forum and the "other" forum, I've found a few pics of 2014+ leveled with 305/65r18 on stockers, but there wasn't any information provided about rubbing, power loss, mpg, or ride quality.

Coming in at 33.5" tall and 12" wide, it should fit especially since BFGs run narrow and squared off with little sidewall bulge. Would like some confirmation though before I drop $1200 on a set!!

Dropsix · December 30, 2015

I just drove 6 hours in the storm yesterday.

My impressions of the tires are this. Really good in snow, so so in slush, not great on ice. Ultimately, I'd say they are as good as dedicated winter tires, but not as good as top of the line dedicated winter tires. I had brand new Yokohama ice guard ig51v's last year and they were better than the K02's in all snow conditions I've faced so far.

Having said that, the fact that they are as good as most winter tires (except the better ones) is good enough for me! Pretty amazing really for an All-Terrain.

Steeks · December 30, 2015

Hey. Finally got my KO2's in a 275/65-20 size. Only a few hundred k so far but really like em. Almost as smooth as the shitty ass sra's. Will post pics soon.

Any issues those are one of the two I was looking at. Either 275/65/20s or the 285/65/20s id like to go with the 285s being they would be a little wider but not as wide as the 33-12.5s. What are your thoughts about fitting since you have the 275/65/20s? Will there be enough room? Think the 275s are 34.1 and 10.5 wide and the 285s are 34.5 and 11.2 wide. Edited December 30, 2015 by Steeks