??Please Help??Toyo MT Proper Inflation??

Below is my sticker. Sorry for the sideways view. Looks like 540 kg or 1200 pounds for the 245/75/16. I reviewed the attached from Toyo, it looks like I need 35 psi for the 255/85/16s. My truck unloaded weighs 4180 pounds. Please confirm how much air I need for no load driving around town?

 

Tires are a funny thing.

I run mine around 30psi

All tires have a sweet pressure where you get the best wear

 

Thank you, I was going to try to get em up to 35. They were down to 23.5 in front and 25 in rear when I tested this morning. That's way too low.

 

you should do the chalk test, not sure if you know about that. takes a bit of time but will help you figure out a good pressure for your truck.
Its just a strip of chalk you put on your tires and you can see if you are under or over inflated after driving a couple hundred feet. Your looking for even wear across the tire.

 

No, I don't know about the chalk test. I will look it up on youtube. Is it possible the rear tires need less than the front or should they all be the same? The front seem flatter than rears at same psi, but I suppose that is due the extra weight in front.

 

different tires but here is how to do the chalk test
https://www.tacomaworld.com/threads/chalk-test-dynapro-atm-at-16-000-miles.226635/

 

That makes sense. Many thanks for the link to the nice visual.

 

Are your Toyos P255 or LT 255? The tire placard should be followed for P245's. I believe you're on the right track on your question. Look on the load inflation tables in the info. from Toyo you provided in the attachment and do your calculations using weight/pressures, etc. from both Toyo & Toyota's placard. You've got some solid tires. I think you're following the "best practices" advice from the literature. Now, you have a choice: The chalk test is suggested by internet 'experts.' The manufacturer, Toyo, uses the recommendations from the Tire & Rim Association. I'm one of those internet 'experts,' but I go by the TRA recommendations. Assuming good camber & toe, you'll get excellent tire wear by following the manufacturer's (they all use TRA pressures) recommendations. My 4WD Tacoma has LT245/75R16E Michelins with 88,000 miles and 5/32nds of tread left at 45 front & 40 unloaded rear pressures...very rural roads. But these are your tires that are in question. You decide.

 

They are the LT, but was running stock OE P245s. Trying to convert from P to LT is the confusing part. If I am reading the chart correctly, I should be running 60 psi. When I had them installed that is what the tire store set em at. I think that was weigh too much. Was like pushin bricks. I set em to 35 but seem to get a lot of extra bouncing.

 

Do you still have the 16x7J rims? If so, check the Toyo website & make sure your tires are approved for the 16x7J rims (or whatever width rims are on your pickup). Step 2: From the pdf you included in your 1st post, there are page numbers in the lower right hand corner. Review pages 7 & 11. Then using information from P. 15 for your OE size tires & page 21 info. on your new LT tires you will find the recommended inflation psi for the new tires. Two further suggestions: Have an alignment done by a mechanic who both knows how to do it and who cares about his results...and this person is not easy to find. Step 2 is to invest in a tread depth gauge (cost around $5. to $10.). Make sure those fine Toyos are well balanced and stay in alignment and carry the recommended tire pressure. You will enjoy the fine handling, smooth ride and long tread life as a result.

 

I just did a quick check and I believe 40 psi is closer than 60, but again, a very quick check. Calculate from the information you have on hand instead of trusting my figures.

 

I am still running the 16X7 rim. I checked to make sure they would fit before purchasing. Thank you for the walk through on the pdf, very helpful. I wish there were a simple formula calculations, like the LT metric to LT metric. That I would understand better than using the tables. I concur, the table suggest I need 40 psi but still seems like a lot. I will say these Toyos tend to throw weights and the last shop that did the alignment had a tough time getting within acceptable tolerances. I've thought about upgrading components to compensate but I am hesitant when I am not sure what will help get the alignment right. I thought about replacing the upper control arms and/or adding a longer knuckle. But then again, I don't want or need a +6 inch lift.