BFG Ko2 tire pressure

I recently went up to 265/70/17 Ko2s (c load) on my 2017 OR on the pro rims. I've searched the forums for the correct tire pressure and have seen everything from 32 to 40 psi. So I emailed BFG and they said 45 psi. Could this be correct? Is anyone else running their psi this high?

Here's an except from their email:
"...we find your original tire size to be 265/70R16 with an original inflation of 30 psi. We need to use 32 psi for our load chart which supports 2234 pounds per tire.
When you changed your tire size to LT265/70R17, the new inflation will be 45 psi which supports 2255 pounds per tire."

 

I run 37 in mine (same size)

 

Depends. But usually 32

 

I bought BF's KO2's and had them mounted at Costco, 275/70R17's. They put 30 P.S.I. of nitrogen them? Seems to me to be a little light? 45 seems a little stiff though.

 

Different tire, but issue is similar. Toyota and tire shop wanted me to run my tires at 32. Engineer from tire manufacturer said run it at 50. I ran it at 44, and it felt like I had just gotten brand new tires. Toyota and tire shops have liability concerns that are not the same as your best tire performance, and their interest is not necessarily equal to your best interest.

 

I run 36 psi on the same tire. Best way to find out the right PSI is to chalk test them to figure out the right pressure for you truck. Weight palys a factor in what PSI you need to run. Google it if you need to know how.

 

ElBlancoTaco and SuperBad thanks.

 

I like 35/34; front & rear respectively.

 

Thanks. Norgeman.

 

They neglected to account for derating.
P and ISO metric are derated by a factor of 1.1 when used on trucks and suvs. LTs need not be derated.
So...
2,234/1.1=2,031 lbs
A LT/265/70/17 attains a load rating of 2,038 lbs at 39 psi.

 

WOW! Thanks!

 

I would be leary of what they used for the OEM tire's load rating; did they use a P or ISO? I suspect they used P; if OEM was ISO...it makes a difference.
Do you recall exactly what was on the sidewall of the OEM tire?

 

275/70/17 Load Range E and I set mine at 36

 

275/70/R17 Load Range E. Same tire and the max load range is 3195 lbs single at 80 psi. I will not be at 80 psi!

 

Gen 3s have a 2,149 lb inflation requirement for OEM P- and ISO- tires.
Or...2,149/1.1=1,954 lbs for LTs.
LT/275/70/17s have a 2,000 lb load rating at 35 psi.

 

You guys are getting way too mathy. Just run a chalk test and call it a day. FWIW, I run 36 front 34 rear on my F250 with 285/75R16 KBro2's if I'm not hauling or towing. 45 psi on a Tacoma would feel like riding on wagon wheels.

 

Hey, thanks. That sounds a lot better.

 

Maticuno, that looks like a FINE ride, good for you!

 

Well this is a Tacoma we're talking about, I'd prefer it not to ride like a horse and buggy.

 

I hear ya...
I did the math to show differences in weight from gen 2 to gen 3.
Also, that psi is a part of total air volume; the tire size is the other part. Change tire size, you change the container volume; psi must change accordingly to accomodate total air volume. PSI is a means to an end.