Tire pressure question

The above chart is for heavy duty trucks with a curb weight of 7000+ lbs. and 10,000+ GVWR. You don't need that much air in a 4000 lb. Tacoma with a 5500 lb. GVWR. With 35 PSI in E rated tires you can carry 1800-2200 lbs. per tire. That's 7200-8800 lbs. at 35 PSI. Considering a Tacoma has a payload of around 1200 lbs. and a GVWR of 5500-5600 lbs. there is no need to put more than about 30 PSI in E rated tires on a Tacoma even with payload maxed out. Which is what I keep in my E rated tires.

 

In Europe for every loadrange/ plyrating, of same sise, a seperate list is made, in wich for higher loadrange lower loadcapacity for the same pressure. Wich is the same as higher pressure needed for the same load.
As European, I always wondered why America gives those listst combined.
And also the European ETRTO is yust as respected institute as TRA.

Made a paintpicture to show why.
So my concusion is even to the other side.

 

I just actually checked the LT tire pressure calculator, and both E and C require 37 psi to carry same weight as tacos stock tire. I was wrong, for some reason i always thought C require couple psi less.

Edit: thats for p265/65/17 vs LT C Load 265/70/17

 

Clever. Very good.

 

I have E-rated BFGs, run 32 street, 20 trails, 12 sand dunes, and up to 45 if pulling a max-load trailer.

 

maths is hard.....

From your posted specs. look at 285/70/17 (Single) vs 275/70/17 (single). (Only change it width), yet the 285 can take same load at less PSI (or more load at same PSI). That confirms first part of that I said accurate.
Nothing I saw on your graph or PDF Link has the same tire in two different load ratings at same psi it was generic info not tire specific. So the second part of what I said isn’t apparent. Also look at BFGs site, last time I looked they had information where you could directly compare the two, and I just checked again it’s their. Also use any of the inflation techniques posted will also show that since the higher rating tires have less sidewall deflection.
Those were my main points, width and rating effect load at PSI. Unless you mean the correct way to check appropriately PSI.

 

No one got my Fibonacci kPA sequence...it translates to 32.57~ psi...

No brownie points or Pi slice for anyone!

 

This!

 

This. My BFG KO2s E-rated like 32 PSI front and 30 PSI rear based upon chalk test. I try to keep them there all year. So far at 45,000 miles on them and still good to use.

 

Thanks for all the replies guys! I am generally lazy and want the easy answer, but nothing is simple- in my life anyway.. I am playing with the pressure and am now at 37,38 on my C rated 285s and I think I am liking that. I don’t plan to change it for different circumstances unless I really need to (air down for ex). I think I’ve found my own personal sweet spot, although I may try the chalk test if I have time some weekend too just to hopefully confirm my read on it. Thanks again!

 

Since tire pressure is the topic at hand, anyone have any info on why my tire pressure sensor is showing the right passenger side tire is low on air but when I check it with my pressure gage it shows it’s fine at 40 psi. then I check the driver side tire and that’s the tire that’s low. Or leaking at the moment because every week I have to fill it. Thanks

 

i like pie

 

/thread

 

No. No. No. That is the worst suggestion of all time. There is absolutely zero scientific value to rubbing chalk on your tires and is completely a waste of time.

 

This post is from august ....

 

3rd gens must weigh more or some shit cause 37 psi in my truck is a recipe for a spinal injury.

 

my e rated 33s like 55psi and there is never a dash warning for that amount. The tires are rated to 80psi I believe but with a Tacoma I don't see that psi as a necessity. For what its worth I have tried 35psi on up. To each their own.

 

I did but the light came
On way after I rotated my tires, I also had a nail in the leaky tire that I fixed

 

I did read the manual but I couldn’t find what
You speak of. I will look again. Thank you kind sir!!

 

I chalked my Toyo open country MTs (E rated) to around 31-33 in the front, and 28 in the rear.

Tire shop had them at 50psi, was bouncing all over the freeway.