Installed Toyo Open Country AT3 EV 116 T XL All-Terrain Tires

[JerseyMike]

I run mine at 42psi, recon grappler SL P275/65/20

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[Zprime29]

Not to continue off the original topic, but this is a valuable discussion about tire pressure.

I had the general grabbers stock, door sticker says 116T 42 PSI. I put on Bridgestone dueler ascent A/T which are 115T. The person at Discount Tire said yo use the same tire pressure since it was the same size as stock. So those are at 42-44 when I check. Should I lower that to 36? I assume that means the TPMS would also need to be adjusted.

 

[JerseyMike]

Not to continue off the original topic, but this is a valuable discussion about tire pressure.

I had the general grabbers stock, door sticker says 116T 42 PSI. I put on Bridgestone dueler ascent A/T which are 115T. The person at Discount Tire said yo use the same tire pressure since it was the same size as stock. So those are at 42-44 when I check. Should I lower that to 36? I assume that means the TPMS would also need to be adjusted.

I would still run them up there, will help with range too....in terms of TPMS, no need to recalibrate them, it is the truck computer that determines acceptable range and that can be changed with forscan

 

[Nikola 369]

Not to continue off the original topic, but this is a valuable discussion about tire pressure.

I had the general grabbers stock, door sticker says 116T 42 PSI. I put on Bridgestone dueler ascent A/T which are 115T. The person at Discount Tire said yo use the same tire pressure since it was the same size as stock. So those are at 42-44 when I check. Should I lower that to 36? I assume that means the TPMS would also need to be adjusted.

I guess at this point I would check the side wall of the tires to see what pressure is max? I wouldn’t want to run tires close to max PSI knowing they will increase with temp. If the 42-44 is close, I would follow Fords lead and have them set like the stock 115T’s were @36. When Ford had this issue, it wasn’t related to tire size, but rather the load rating between 116T & 115T. Maybe the store guy didn’t Full understand the issue Ford had. There’s a few hundred pounds difference in load range between those tires and the higher pressure could be an issue over time if close to max rating.

 

[Firn]

I guess at this point I would check the side wall of the tires to see what pressure is max? I wouldn’t want to run tires close to max PSI knowing they will increase with temp. If the 42-44 is close, I would follow Fords lead and have them set like the stock 115T’s were @36. When Ford had this issue, it wasn’t related to tire size, but rather the load rating between 116T & 115T. Maybe the store guy didn’t Full understand the issue Ford had. There’s a few hundred pounds difference in load range between those tires and the higher pressure could be an issue over time if close to max rating.

Running at max should be no issue. There is a very large factor of safety here. The tire manufactures have to plan for people hauling at max capacity and starting off the day with cold mornings and driving into hot days.

 

[Nikola 369]

Running at max should be no issue. There is a very large factor of safety here. The tire manufactures have to plan for people hauling at max capacity and starting off the day with cold mornings and driving into hot days.

I’m only suggesting caution and keeping the margin wide. I have driven a couple million miles to date and never had a blown tire. I know so many people who have, sometimes related to a load within load rating. Other times for no explainable reason. You have to question pressure. Ford learned a really painful lesson in the past on this issue. To make a softer smoother ride, they suggested lots of vehicles run 26PSI on tires rated 32-35PSI………. It didn’t go well, lots of blowouts, some roll overs, and many millions of dollars in wrongful death suits. I suggest caution and trying to stay close to ratings by OEM and tire manufacture.
We can talk all day about safety factors and margins, but unless someone has the engineering from the tire OEM, then it’s just talk. In another job field, I used to inspect overhead cranes in the maintenance field. 40 yrs ago, manufactures used to use a safety factor of 15-20/1 for failure ratings. 25-30 yrs ago, it was changed for unknown reasons to 10-12/1. Now somewhere mid to late 2000’s, European manufacturers started selling state side and buying out other USA manufacturer. There is one, I won’t mention the name, that uses 3/1. Sharing this information, which system do you want to be in the same building with? Caution goes a very long way to preventing a varied result.

 

[AlexM]

I got the Toyo AT EVs for our truck as well (stock size, 275/60/R20). The stock tires weren't doing it justice in the snow. These tires have been great. Definitely improves the look of the truck in my opinion. Here are some high level thoughts:

• Noise: noticeable compared to the stock tires but not significant. Overall, less than expected and very pleased. After a day or two I stopped noticing it.
• Efficiency: Doesn't seem to be any significant effect. It's hard to say as it got progressively colder after I installed them so range was being hit regardless.
• Ride Quality: this has actually improved in my opinion.

I have owned a number of AT tires on other trucks in the past, and these are by far the quietest. I don't expect them to work quite as well in the snow as the Goodyear Wrangler Duratracs, but in the few small storms we've had I've had no issues.

 

[mtg]

@AlexM what tires did yours have as stock?

 

[AlexM]

@AlexM what tires did yours have as stock?

Goodyear Territory HT

 

[nodoubleg]

I've got 35 inch E-rated tires on my much lighter Jeep JKU (Micky Thompson Baja MTZ, definitely NOT an EV-friendly or even pavement friendly tire). On the Jeep, mostly to have a more robust sidewall and to be able to safely run lower tire pressures when aired down off road. The wider, larger E-rated tires only need 28 psi to have the correct contact patch with my Jeep's current weight. As for noise? well, it's a jeep. And these mud terrain tires HOWL on road.

In the past, I've had a 1st gen Honda Insight. Like many other owners, I'd run those tires at 50+ psi for greater efficiency. The higher-than-specified pressures helped even out the tire wear on the OE tires. In that little 1800-pound Honda, the ride got a lot rougher and louder at the higher pressures.

Finally, as a cyclist (road and gravel), I've been running tubeless tires the past few years, and I've been adjusting my tire pressures DOWN, finally leveraging one of the qualities that the pneumatic tire was originally designed for: some squish. On a bike, you're cruising on maybe 100 watts of power. There, reduced fatigue from a slightly softer ride more than compensates for a watt or two lost to rolling resistance. PSI numbers vary widely here, depending on the bike, tire, intended terrain, the load I'm carrying, etc, but there's usually always some "squish" to the tire.

So, these are my data points of experience with trying to figure out tire pressures.

Onto the Toyo Open Country ATIII EV tires:

I've had mind for about 10,000 miles at this point. They are definitely louder than the OE "all-terrain" 115-rated tires. The tires make up for most of the road noise when on the highway. The difference was definitely noticeable to me, but my wife had no idea anything had changed the next time she took the Lighting out. Turn the radio on, and you won't notice.

Given what I've had happen on the Jeep, I've been somewhat concerned about experiencing uneven wear on these Toyos if I run them too hard, so I've only been running them around 45 psi or so.

Anybody with the E-rated version of these Toyos run these at even higher pressures? How's the ride and tire wear been for you?

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