20" Inch Toyo Open Country A/T III EV 275/65/20 116H tires review

[KBabione]

I run them at stock which is 48 psi cold and around 50 lbs hot around town.

Once in a while I have to pull over after a long road trip where the exterior temp goes from cold to hot which increases tire pressure and then I have to let some air out when I go over the max psi.

I admit to learning a lot about tires since we got the Rivian and I'm looking at replacing my 20" Pirelli's, but one of the things I thought I knew was that the "Max PSI" on the tire was the cold pressure and that the tire was designed to handle "normal" heating from driving as long as the cold pressure didn't exceed the max. Am I wrong?

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[MidnightRivian]

I admit to learning a lot about tires since we got the Rivian and I'm looking at replacing my 20" Pirelli's, but one of the things I thought I knew was that the "Max PSI" on the tire was the cold pressure and that the tire was designed to handle "normal" heating from driving as long as the cold pressure didn't exceed the max. Am I wrong?

I personally try to keep the max pressure after driving below what is listed on the tire.

 

[Killer95Stang]

I personally try to keep the max pressure after driving below what is listed on the tire.

Personally, I think you aren't giving the tire engineers enough credit, since they are aware that tire pressure goes up when it gets warm out. That number on the side is max cold pressure, which accounts for variations in temperature as the tire heats up. Honestly, they are your tires, and you can do whatever you want, but I think you are doing too much.

 

[jfoonly]

FWIW Rivian service inflates my 20" pirellis to 51 psi as part of their courtesy check, not the 48 from the door sticker. And it's even written up in the service report as 51. That's the max inflation shown on the tire.

 

[MidnightRivian]

Personally, I think you aren't giving the tire engineers enough credit, since they are aware that tire pressure goes up when it gets warm out. That number on the side is max cold pressure, which accounts for variations in temperature as the tire heats up. Honestly, they are your tires, and you can do whatever you want, but I think you are doing too much.

I agree that tire engineers have a margin of safety built in. I personally tested that with the Pirelli XTM AT when I went over the max PSI.

I always play it safe as much as possible and stick to 48 lbs - 50 lbs for the Toyo AT III EV in SL.

 

[KBabione]

I agree that tire engineers have a margin of safety built in. I personally tested that with the Pirelli XTM AT when I went over the max PSI.

I always play it safe as much as possible and stick to 48 lbs - 50 lbs for the Toyo AT III EV in SL.

Thanks - I think my plan is to be at 48 psi for the Toyo AT III EV in SL. The load rating, I believe, is the compensating factor that works with the max psi to ensure that you're using the tires within their defined limits.

 

[ksurfier]

Thanks - I think my plan is to be at 48 psi for the Toyo AT III EV in SL. The load rating, I believe, is the compensating factor that works with the max psi to ensure that you're using the tires within their defined limits.

Cold inflation pressure (CIP), (there’s no need to readjust when tires heat up):

Safe range for CIP is 40-50 psi

CIP 45 - Best for light loads (single person), or if a smoother ride is desired
CIP 48 - middle ground (Rivian spec)
CIP 49-50 - Best when fully load, or if trying to get top performance/handling

it may be useful to lower CIP if driving in more bumpy/rough areas (potholes/offroad), however driving at highway speeds with CIP under low 40s is not a good idea (deformation and heat buildup). An easy thing to do is note when CIP reaches 46, then raise CIP to 49-50 (more or less what I do).

One other adjustment is the rear can be 1-2 psi more than front, for example 46-47 rear, 45-46 front, since more load is carried on the rear axle. I would guess most/all of us have glanced down in the morning and seen low 40s.

Anecdotally, over >20k miles I’ve seen nearly perfect tire wear using the max tire pressure as a guide (example of 50 CIP; but 53-54 when hot).

 

[SwaziCAR]

From the FWIW Department:

Just had the tires rotated at 5,500 miles. Tread seemingly is even at 12/32 (new tread is supposedly 13.5/32).

Per the vehicle, efficiency is 2.32 miles/kWh for those 5,500 miles. (This is for July-October, so warm weather driving.) Efficiency for the original Pirellis was about 2.22 miles/kWh (for November 2023 - July 2025) for the roughly 23,000 miles they lasted.

No performance complaints so far.

 

[Dynasty122]

Wanted to post a quick early review of this tire - I have been waiting a while for it and it now appears to be easily available at Tire Rack. The LT 275/65/20 version has been out for a while but I was looking for the above version instead and found it at TR.

https://www.tirerack.com/tires/tires.jsp?tireMake=Toyo&tireModel=Open+Country+A/T+III+EV&partnum=765HR0OPA3EV&vehicleSearch=false&fromCompare1=yes

With the new partnership between TR and DT, I was able to get these shipped directly to a local discount tire location. Got them installed for about $100.
Previously had 30K miles on the Pirelli Scorpions and that is the comparison

Price - easy win for the Toyo here, about $100/tire cheaper
Ride Quality and Handling - fairly subjective, but I think improved. Would be best to compare a new set of Pirellis to these. I felt like my ride quality in the pirellis had really deteriorated in the last few thousand miles so not exactly apples to apples.
Efficiency - I'm sitting at 1.87 miles/kWh with cold temps after a few hundred miles, probably was closer to 1.8 last winter with the Pirelli's here in Colorado. Will be more clear over the lifetime of the tires.
Snow/Ice - Fairly significant win for the Toyo's so far. In the Pirelli's I felt like I would get small slips that the traction control would quickly correct for, haven't had any of those so far and it feels very rock solid over snow and ice.
Off Road - TBD but the sidewall looks beefier and I suspect will be better.
Appearance - Personally I significantly prefer the Toyo.
Noise - fairly minimal, didn't have much of an issue personally with the Pirelli's either though.

Overall this seems to be a definite improvement on the Pirelli's at this early stage and would recommend for those looking for a replacement tire for their 20" tires.

Do you have a zoomed out pic of your truck? Curious to see how they look on it

 

[UnsungZero_OldTimeAdMan]

Do you have a zoomed out pic of your truck? Curious to see how they look on it

Forum search by tire name and you will find previously shared images. There is no difference in appearance between SL and LT versions.

 

[roketdog]

I try and have my cold air temp pressure (mornings and late night) prior to driving at 48psi. Then daytime I see it fluctuate 49-51. I average 2.1 to 2.5 miles/kwh on drives 15min +.

My total average was 2.11 for the tire, but my driving habits this past summer when going up to the mountains and passing cars knocked it all the way down to 1.66. I go about 75-78mph from San Jose to South Lake Tahoe. Usually 60mph through mountains on Hwy 50, and pass any cars in passing lane going slower. My avg gets sucked low on Hwy 50.

Love the tires, love my Rivian. So much fun to drive and passing is too easy.

 

[Dynasty122]

Wanted to post a quick early review of this tire - I have been waiting a while for it and it now appears to be easily available at Tire Rack. The LT 275/65/20 version has been out for a while but I was looking for the above version instead and found it at TR.

https://www.tirerack.com/tires/tires.jsp?tireMake=Toyo&tireModel=Open+Country+A/T+III+EV&partnum=765HR0OPA3EV&vehicleSearch=false&fromCompare1=yes

With the new partnership between TR and DT, I was able to get these shipped directly to a local discount tire location. Got them installed for about $100.
Previously had 30K miles on the Pirelli Scorpions and that is the comparison

Price - easy win for the Toyo here, about $100/tire cheaper
Ride Quality and Handling - fairly subjective, but I think improved. Would be best to compare a new set of Pirellis to these. I felt like my ride quality in the pirellis had really deteriorated in the last few thousand miles so not exactly apples to apples.
Efficiency - I'm sitting at 1.87 miles/kWh with cold temps after a few hundred miles, probably was closer to 1.8 last winter with the Pirelli's here in Colorado. Will be more clear over the lifetime of the tires.
Snow/Ice - Fairly significant win for the Toyo's so far. In the Pirelli's I felt like I would get small slips that the traction control would quickly correct for, haven't had any of those so far and it feels very rock solid over snow and ice.
Off Road - TBD but the sidewall looks beefier and I suspect will be better.
Appearance - Personally I significantly prefer the Toyo.
Noise - fairly minimal, didn't have much of an issue personally with the Pirelli's either though.

Overall this seems to be a definite improvement on the Pirelli's at this early stage and would recommend for those looking for a replacement tire for their 20" tires.

any rubbing issues?

 

[gtrivian]

any rubbing issues?

No nothing. it's the same size as the OEM AT so shouldn't be an issue at all

 

[nolanmh28]

Not a Rivian owner but wanted to share I appreciate the input on the Toyo OC AT3 EV tires. I have a 2025 Ram 1500 Laramie with the new 3.0L inline 6. I always level my trucks but when you go up in tire size: weight, efficiency and load ratings always become unfavorable.

When I was researching tires I saw both the LT and SL variants of the EV Toyos. The OEM 275/55R20 Nexen Roadians weighed 35 lbs per tire. The SL Toyo EV weighs 43 pounds which was a huge win compared to all the other 275/65r20. I believe the second closest tire was the Nitto Terra Grappler G3.

I have ran these tires since July and sound and handling is awesome, very close to the smaller OEM highway tire. Fuel economy has been above my expectations as well. On trips throughout South Texas, I average 20-23 mpg still. Combined I see roughly 18.5+ mpg. Very comparable to the OEM smaller tires. I am even leveled 2.5in in the front.

Very happy with these tires and am definitely keeping in mind for future pickups.

 

[suprteck]

Nice review! I have the LT version, and really enjoying them

How is your efficiency? I have the Nitto Terra grappler G3 LT275/65/20 and think I’m going to exchange them for the Toyos. Really took a hit to my mileage so far

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