What PSI are you running?

[tacorancher]

285/70/17 SL Falken AT4W at 35. Seems ok

I have those identical tires. They are quite nice. I recommend 30-32. After 12K miles they are wearing evenly and are super cushy. But 35 works too.

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[MustardTiger]

I should lower them a few pounds for winter. Do you find they throw stones? I'm finding this to be a problem

 

[Kielly]

32 cold

275/70/18 KO3s

Anything higher and the ride just gets too rough.

Dealer loves to fill them to 35-37 and I get mad. One hump and the rear end jumps around.

 

[ixo]

32 cold

 

[cswitz]

I should lower them a few pounds for winter. Do you find they throw stones? I'm finding this to be a problem

I personally do find that they throw more stones from trails and dirt roads. The lugs on the tires are spaced farther apart so they pick up bigger rocks than the stock tires do. My back fenders have probably a dozen rock chips since I got the ko3’s. I grabbed some Ark mudflaps to replace my wimpy stock ones that I’m planning to install this weekend. Also grabbed some touch up paint.

 

[izzy]

32 cold

275/70/18 KO3s

Anything higher and the ride just gets too rough.

Dealer loves to fill them to 35-37 and I get mad. One hump and the rear end jumps around.

I have to tell them every time "Please do not adjust the tire pressure, I just set it to 30 all around"

They've been good about it cause the 265/70/17s at 35 psi ride like rocks.

 

[cswitz]

32 cold

275/70/18 KO3s

Anything higher and the ride just gets too rough.

Dealer loves to fill them to 35-37 and I get mad. One hump and the rear end jumps around.

I have the opposite problem. My dealer brings mine down from 35 to 30 to match the door card. At 35 I don’t feel it jumping around, but I do notice a bigger hit to MPG at 30.

 

[izzy]

It's possible the softer TRD OR suspension means at higher tire pressures you're reducing the tires own deflection when a bump compresses the suspension.

That means the shock and spring takes more of the immediate load instead of the tire (less bounce). I bet low speed it's pretty firm still.

Might feel better on high speed bumps but you're probably going to get center tread wear unless you increased the weight of the truck a lot.

 

[cswitz]

It's possible the softer TRD OR suspension means at higher tire pressures you're reducing the tires own deflection when a bump compresses the suspension.

That means the shock and spring takes more of the immediate load instead of the tire (less bounce). I bet low speed it's pretty firm still.

Might feel better on high speed bumps but you're probably going to get center tread wear unless you increased the weight of the truck a lot.

According to @tacorancher’s link
https://tiresize.com/pressure-calculator/

30psi for standard load tires equals 40psi for E-loads in our size. I’ll see if I can find some sidewalk chalk this weekend to confirm some of these conflicting factors floating around.

 

[Taco Ji]

285/70/17 Falken Wildpeaks AT4W was running 32 psi but bumped it to 37 for cold weather anticipation of the tire pressure dropping.

 

[Kielly]

I have to tell them every time "Please do not adjust the tire pressure, I just set it to 30 all around"

They've been good about it cause the 265/70/17s at 35 psi ride like rocks.

Yup, I've had them inflate to nearly 50psi before on my old Duratracs, hit one bump and my rear end quite literally skipped the the side on dry pavement lol

 

[vtdano]

Hey everyone,


I’m running 275/70/18 BFG KO3s (E load) on my Sport and have been really happy with the performance so far. The traction, handling, and ride quality have all been great (besides the drop in mpg, but that was obviously expected).


I’m curious what PSI others are running with similar setups both for daily pavement driving and off-road use. Right now I’ve been experimenting around mid-high 30s for everyday/street, but I’m not sure what's optimal. As for off-roading, I usually air down quite a bit, but I’d love to hear what’s been working best for everyone else. What is everyone running on/off road?

Thanks

30 cold, front and rear. I also wanted to add, has anyone else noticed that when it's lower and you get the check tire pressure warning at startup, it doesn't even show what the pressure is? I have seen other makes and models that show the actual pressure at startup, just not this one. One of MANY reasons I am disappointed in the Toyota Infotainment software, it's got a lot of bugs!

 

[cswitz]

Update on the chalk test for the E-load KO3's: there was no significant difference between 35psi and 50psi for the chalk pattern. I was trying to find the upper limit to get any change in the chalk test. I took it around the block at 50 and it was every bit as teeth-rattling as y'all have been complaining about. Since I saw no difference in the chalk test I'm taking them back down to ~32-35. I'm not sure if the increased sturdiness of the E-loads meant less significant change in the chalk test at different psi or if I screwed it up somehow, just thought that was weird.

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