D/E - Class rated tire pressure

[SROC3]

What is everyone running on their D or E rated tires? I have 35s, Toyo Open Country M/Ts (E Rating) and am running 32psi. Is there a limit on how low is "too low"?

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[PWillette]

I'm running 31psi cold on my "D" Nittos.

Too low will vary by tire but for on the road travel at highway speed I probably wouldn't run a 35" or 37" tire below 25psi. Wheeling on non-beadlock wheels 18psi would be my low.

 

[AKBronc49]

Running 32psi in my E rated 315/70R17 Nokians. That's for the last 3 winter seasons. I bet I would be happy with 30 psi but it sets off the TPMS light.

 

[Spooled]

I run 30 in my E-rated Falkens and just deal with the TPMS light.

 

[SROC3]

I run 30 in my E-rated Falkens and just deal with the TPMS light.

You can actually FORscan that to be at a lower threshold.

 

[akturbo]

I'm running 32-33 on my 37 Ds. I upped to 35 (they warmed up to 41) for a 600 mile drive this weekend, not sure but it seemed to help with vibration at 75+. I just need to get in for another balance.

 

[Pilsner]

On my Jeep, I run 37s at 26 cold. There are calculators available online that will give you the pressure you should run on larger tires compared to stock.

 

[JediMcMuffin]

On my Jeep, I run 37s at 26 cold. There are calculators available online that will give you the pressure you should run on larger tires compared to stock.

Can you link one? I went with Falken R/T01s, currently running 39PSI. My fuel economy at 35 was dismal.

 

[Pilsner]

Can you link one? I went with Falken R/T01s, currently running 39PSI. My fuel economy at 35 was dismal.

Here is one. You need to know the OEM tires and pressure from the door sticker to get you close. Manufacturers sometimes also will list comparable pressures. I got my info from Mickey Thompson's site somewhere when I set mine.

https://tiresize.com/pressure-calculator/

 

[V1Rotate]

Chalk tested my 37" Toyo MT's with my setup and ended up being around 31-32 front and 30 rear. Been running that pressure for 30k miles (for the on-road stuff anyway) and rotating every 5k and they're dead nuts even on wear with tons of life left

 

[SierraBronco]

Adjusted threshold with Forscan and running 25 psi on C rated tires. Lots of capacity still according to Toyo spec sheet.

 

[Tricky Mike]

I run my E rated 37s at 30-32ish normally to try to get more even wear, and 35-37ish on long trips.

 

[Brian_B]

30-32 psi cold on my M/T Baja Legend EXP D rated.

Very even wear after 40k miles so far.

I readjusted the low pressure warning with Forscan as well.

 

[SROC3]

I tired 30 cold and anything less than 32 cold just feels too "squishy" to me on my Toyos. I don't like it when I wiggle the wheel a little and it feels like I'm "sliding left-to-right." I'm still trying to MATCH my tire pressure properly to my newly installed KINGs. I want just the right amount of comfort with the best feeling of firmness too, not harsh bounciness over road imperfections. I hate it when my vehicle "rattles".

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