allinon72

I just got these tires and Discount Tire put them at 45psi.

Derek Dauzat

OK my 07 z71 Tahoe curb weight is 5,524.... then add full tank and two people I'd round it off to 6000lbs ..... OK so Max overall Tahoe carry weight is 7,200 ... GVWR gross weight vehicle rating.... OK got that so far... so I'm still under that max GVWR.. now my new bfg ko2's have a ***(MAX)*** rating of 3,192 (per).. tire @80psi .. so multiple that x4 = 12,768lbs
That is what the tires combined can handle Max @ 80psi... but that is super overkill .. on a daily basis only 6,000 is on all 4 tires, ...... so the rating for my ko2 275/70r17 @ 35psi is 1,177lbs on one tire .. so multiple that x 4 is 7,080lbs the tire can handle at all four on 35psi ...
And that's what it says to run on the door of the Tahoe... also remember Tahoe can only have a Max overall people gear + Tahoe weight of 7,200 GVWR... so that makes sense don't you think.... also I have a 26ft bumper pull camper it's dry weight is 4,600lbs when loaded I'd say it's 5,000 lbs .... now that weight is not all going on your truck .... the camper has its own tires tandem axle with 4 tires that handle most of that weight.. only about 10% of total camper weight is on the hitch of the Tahoe so that will be about 500lbs .. so the daily driving weight of the Tahoe is 6000 lbs just split that to each axle it's about 3,000 lbs on each axle without towing my camper..... 35psi per tire can handle 1770 .. x2 in front axle is 3,540 same in rear axle .... now add that 500lbs hitch weight from camper to just the rear axle it's now 3500lbs so it's still can handle it but this is what I run.....

not towing camper / just Tahoe 35-36 all around .....
Towing camper.. 35 front axle 41 rear axle psi per tire.. my tire @ 40psi can handle 1945 and x2 is 3,905... so that will cover the 10%/500lbs of the hitch weight of the camper.....

If I air more than any of that.... than I'm over inflated and will kill my tire life.... why would I air them to 50or 80 psi when I am not needing nowhere near that weight.. I'd have major middle tire wear..

Blown F-150

I think that unless you have a specific towing/hauling need, you don't need an E rated tire on a 150. Most half-tons are rated for way less than the capabilities of an E rated tire and I would think they are more for the 3/4 and 1 ton crowd.

Correct me if I'm wrong, but a C or D rated LT tire should suffice for 90% of F150 owners???

jjuddz

Omg people, quit talking about using the tire placard in the door. That is for D rated tires that come with the truck. Not the E rated tires the OP is talking about. That's like comparing oranges to apples. Like the others have said, if you run 35, that is way under inflated for that tire and you will have premature tire wear and shi**y mileage.

Derek Dauzat

Yes the tag in the door is for p rated tires but.. my ko2's (E) 10ply 275/70r17 have a variety of weight range... this is an email from bf Goodrich .....
Congratulations on your new BFGoodrich All-Terrain T/A KO2 tires purchase!


We appreciate your inquiry as to the proper inflation pressure of your BFGoodrich tires. Correct tire inflation pressure also allows you to experience tire comfort, durability and performance designed to match the needs of your vehicle. Our records show the 2007 Chevrolet Tahoe LT came with several original equipment tire size options.

Since your vehicle has a different size tire than what was specified by your vehicle manufacturer, it is important that the tires be inflated to provide the same load capability of the original tire size at the manufacturer’s recommended pressure.

Unfortunately, we cannot recommend an air pressure for your tires while towing your trailer due to the different types of vehicles and trailer weights available. We can, however, let you know that your BFGoodrich All-Terrain T/A KO2 LT275/70R17/E tires can hold 1770 lbs. at 35 psi, 1945 lbs. at 40 psi, 2110 lbs. at 45 psi, 2270 lbs. at 50 psi, 2430 lbs. at 55 psi, 2595 lbs. at 60 psi, 2755 lbs. at 65 psi, 2900 lbs. at 70 psi, 3050 lbs. at 75 psi, and 3195 lbs. at 80 psi. Please check with your vehicle manufacturer for the recommended air pressure in your tires if towing a trailer, hauling heavy loads, or driving in unloaded situations.

We hope you enjoy your new BFGoodrich tires!

Derek, we appreciate your business and thank you for choosing BFGoodrich

Sincerely,

Jackie
Consumer Care Department
Certified BFGoodrich Product Expert......

So my tire even though it E rated only needs the required psi to handle the weight that's being applied...
BFGoodrich All-Terrain T/A KO2 LT275/70R17/E tires can hold 1770 lbs. at 35 psi, 1945 lbs. at 40 psi, 2110 lbs. at 45 psi, 2270 lbs. at 50 psi, 2430 lbs. at 55 psi, 2595 lbs. at 60 psi, 2755 lbs. at 65 psi, 2900 lbs. at 70 psi, 3050 lbs. at 75 psi, and 3195 lbs. at 80 psi.


So why would I be wrong to put 35-40 psi in them?

eng45ine

I am running 45 psi in my BFG All Terrain T/A KO2 275/65R20s

MCDavis

iTrader: (1)

That's what the folks @ BFG told me via email. 45 PSI in the 275/65/20 most closely matches the weight rating of the factory P-rated needs. Seems like a good starting point for our truck and that exact tire.

techrep

iTrader: (1)

I ran 40psi winter and 50psi summer and rotated every 5K with oil change and had perfect wear for 53K miles.. bump up to 65psi when towing.

Paxford

Because more psi reduces tire roll. Sure 35-40 psi will handle towing, but not as well as higher psi. You will notice the benefit in high winds, rounding a curve at freeway speeds, passing a semi, uneven road sections, etc. Inflating to 80 psi will make it ride rough so 50-60 psi may be the better number. Don't ride at higher psi all the time for the wear reasons you stated, just when towing.

When my trailer was 6k I noticed the difference airing up. Now that my trailer is 3k it is less noticeable. I don't bother to air up unless I am doing a lot of miles or driving in crappy conditions.

Your trailer at 4600 may not be heavy enough for you to notice a difference until you are in a terrible storm crossing a bridge with 80 mph side winds ... then you'll be glad you aired up.

Keith460

iTrader: (1)

I have the new 10ply KO2's on my current 13' F150 and inflate them to 38psi for everyday driving without a load. When hauling heavy loads I inflate to 42-45psi.

My old 02' F150 SuperCrew went through two sets of BFG's old 6ply versions of the AT and I kept 40psi in them while driving unloaded. I got 90,000 and 100,000 miles out of each set of tires with even wear.

Why one would drive around with 50psi or more on a daily basis is beyond me. They're pickup trucks, not dump trucks.

Do a chalk test on pavement to determine psi to achieve the correct contact patch. Even going to a parking lot that has dried salt on it from winter applied salt will do the trick.