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

[risingphoenix]

If tested under same exact conditions with the same exact driving, physics won’t lie. Lighter = more efficient. And you won’t ever find this info online from other users because conditions and use aren’t ever the same. The SL is around 3 lbs lighter than the Pirelli AT Plus. The LT is 7 lbs more. Significant difference, especially when motion (and rotational mass) is involved.

Physics is more than just weight, otherwise my Toyos that are "7 lbs more" would not have the exact same efficiency as the Pirellis. Rolling resistance being a huge factor. And weight isn't the only difference between the SL and LT as the SL is 0.5" more narrow. Nevertheless, I don't want to argue theoretical points with you. I just wanted to point out that, to date, I have not seen a single owner of the SL tire report efficiencies that are significantly better than the LT. Those that are claiming that the SL has significantly better efficiency than the LT are not basing that on real world data. Buyer beware and YMMV, etc.

Sponsored

 

[MoreTrout]

I've got 15K miles on my LTs. I am satisfied as I off road quite a bit (Colorado). I considered the SLs but could not find any efficiency data on the SL tire that showed it is more efficient than the LT. AFAIK, the efficiency is about the same, which is counterintuitive given the weight difference. I'm at 2.25m/kWh 15K miles in, which is virtually identical to the stock 20" Pirellis. Not bad mouthing the SL at all, but if the efficiency is truly the same between the SL and LT, there would be less reason to go with a less durable tire.

Thanks for this. I've been leaning towards the LTs for some time but talk myself in circles. Most of my miles are highway and rural roads with few stops/starts, and all summer that includes light towing of my EGO zero turn on a small ramp trailer. The towing started just before my second set of stock Pirellis, and they definitely wore out faster than the first set. I do a fair amount of driving on forest roads, but they are mostly well maintained. I think my biggest desire is for longevity. Just for arguments sake, if I had to replace SL's every 20k vs LT's every 30k, that's one extra set every 60k miles, and it would take a rather massive efficiency difference to offset the cost of a full set of tires. Especially since my home charging is essentially free as my solar array produces more than I use in a year. Now I'm fairly certain I'll pull the trigger for the LTs.

 

[ksurfier]

Physics is more than just weight, otherwise my Toyos that are "7 lbs more" would not have the exact same efficiency as the Pirellis. Rolling resistance being a huge factor. And weight isn't the only difference between the SL and LT as the SL is 0.5" more narrow. Nevertheless, I don't want to argue theoretical points with you. I just wanted to point out that, to date, I have not seen a single owner of the SL tire report efficiencies that are significantly better than the LT. Those that are claiming that the SL has significantly better efficiency than the LT are not basing that on real world data. Buyer beware and YMMV, etc.

What’s your elevation?

 

[SirMouthsALot]

While we're at it, one thing that often gets missed in these discussions of SL vs LT is the effect on the vehicle's driving dynamics. I went to a LT tire that weighs 61 lbs, and it has negatively affected the handling of my R1T. Launches are significantly slower, and the steering is sluggish and much more truck-like.

The extra rotational (and unsprung) mass is no joke. When changing lanes on the highway, for example, the inertia of the tires creates a see-saw effect that makes it feel like you're steering a ship, not a Rivian. This isn't a big deal for some, but I miss the sharper handling and will be going back to a tire that weighs 48 lbs or less.

 

[risingphoenix]

While we're at it, one thing that often gets missed in these discussions of SL vs LT is the effect on the vehicle's driving dynamics. I went to a LT tire that weighs 61 lbs, and it has negatively affected the handling of my R1T. Launches are significantly slower, and the steering is sluggish and much more truck-like.

The extra rotational (and unsprung) mass is no joke. When changing lanes on the highway, for example, the inertia of the tires creates a see-saw effect that makes it feel like you're steering a ship, not a Rivian. This isn't a big deal for some, but I miss the sharper handling and will be going back to a tire that weighs 48 lbs or less.

FYI this is another example that real life experience does not always agree with theoretical physics. I replaced the stock 20" Pirellis with the much heavier Toyo LT tire yet the LT has the same efficiency and also has much better lateral torque compared to the Pirelli (based upon open pilot testing in my vehicle and many others). I would be surprised if you have the Toyo LT tire, as my experience has been the opposite.

 

[SirMouthsALot]

FYI this is another example that real life experience does not always agree with theoretical physics. I replaced the stock 20" Pirellis with the much heavier Toyo LT tire yet the LT has the same efficiency and also has much better lateral torque compared to the Pirelli (based upon open pilot testing in my vehicle and many others). I would be surprised if you have the Toyo LT tire, as my experience has been the opposite.

I've got the Cooper Discoverer AT3 XLT. Can't speak to the Toyos. In my experience, lateral traction for this tire is on par, if not better than the OEM Pirellis, but it's the rotational inertia that creates the feeling of "lag" that I notice when changing directions. Efficiency is close the the Pirellis, perhaps 10% worse.

 

[Mark_AZR1T]

I've got the Cooper Discoverer AT3 XLT. Can't speak to the Toyos. In my experience, lateral traction for this tire is on par, if not better than the OEM Pirellis, but it's the rotational inertia that creates the feeling of "lag" that I notice when changing directions. Efficiency is close the the Pirellis, perhaps 10% worse.

I’m running the exact same tire and haven’t experienced any of the directional lag you’re describing with the Coopers. I keep mine at 65 psi, and at 55,000 miles they’re the best AT tire I’ve ever owned on any vehicle, still quiet, wearing perfectly, and with about 5,000 miles left in them. I’m also getting roughly 96% of the efficiency I had with the original Pirellis. Too bad this exact tire isn't available any longer.

 

[SirMouthsALot]

I’m running the exact same tire and haven’t experienced any of the directional lag you’re describing with the Coopers. I keep mine at 65 psi, and at 55,000 miles they’re the best AT tire I’ve ever owned on any vehicle, still quiet, wearing perfectly, and with about 5,000 miles left in them. I’m also getting roughly 96% of the efficiency I had with the original Pirellis. Too bad this exact tire isn't available any longer.

Glad you like them! They're a little to truck-like for my taste, but I otherwise agree - after 20,000 miles they have performed well in pretty much all conditions: heavy rain, snow, off-road, etc.

It's going to be hard to find a good replacement for them (which is why I've been reading this thread).

 

[skiborsy]

Physics is more than just weight, otherwise my Toyos that are "7 lbs more" would not have the exact same efficiency as the Pirellis. Rolling resistance being a huge factor. And weight isn't the only difference between the SL and LT as the SL is 0.5" more narrow. Nevertheless, I don't want to argue theoretical points with you. I just wanted to point out that, to date, I have not seen a single owner of the SL tire report efficiencies that are significantly better than the LT. Those that are claiming that the SL has significantly better efficiency than the LT are not basing that on real world data. Buyer beware and YMMV, etc.

Starting to hunt for replacement tires for our 2023 R1S Quad. I've seen the .5" spec on Tirerack.com and repeated here, but Toyo lists the SL and LT as being the same width (11.0"). Has anyone actually compared the SL and LT in the flesh to confirm the width difference (if any)?
https://www.toyotires.com/product/open-country-at3-ev/

 

[1stTimeTruckee]

So I ended up going with the SL tires and the very first time going off road I sliced the sidewall at the very end of the day. Nothing crazy at all, I was going through a muddy area about 8 inches deep and hit a Rock I couldn’t see. I travel with a full spare and GlueTread for repairs so I got through it and all is good, just now need to replace the tire. I wish I would have went with my gut instinct to get the LTs, not just because of the replacement cost but also now I’m less confident with my SL tires especially if I go out on a solo trip. It doesn‘t take extreme off roading to slice a sidewall, just a bit of bad luck and a rock sticking out in a rut or in my case not visible. The good news is that at least now I know I can change a tire in bad conditions at the end of the day!

The trail guide I was with said it’s pretty common to see sidewall failures off road with SL tires and that he just doesn’t see nearly as much with LTs.

 

[gtrivian]

I’m tempted to go with the LT for my next set for this reason. I’m close to 25k miles on the SL and will probably need a replacement in the next few months. Haven’t had any issues yet, thankfully.

 

[Singletracker]

I’m tempted to go with the LT for my next set for this reason. I’m close to 25k miles on the SL and will probably need a replacement in the next few months. Haven’t had any issues yet, thankfully.

Go with the LT’s, if you go off road, at all. For the record, I now have about 4000 miles on my Bridgestone Dueler A/T Ascents LT275/65-20. They are still very quiet and I have experienced no efficiency hit versus the OEM PirellIs. I run them at about 55 PSI. Noticed a little stiffer ride, at first, but now it Is not an issue.

 

[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.

More from the FWIW Department:

Have slightly less than 12,000 miles on the SLs and recently had them rotated for the second time. No obvious wear issues, and no complaints about performance.

Per the vehicle, efficiency on the new tires dipped to a cumulative low of 2.26 miles/kwh over the winter. Just this week, I saw an uptick to 2.27 miles/kwh, presumably due to warmer temperture over the past few months; this is for the period July 2025 - May 2026.

 

[drumminguy81]

Super excited to finally join the toyo club, I went with the Lt because the price and availability was right. i originally wanted the sl but the thicker tread was appealing. Went with 275-65-20 so far I'm very happy they look amazing, ride nice. Slightly noisy but I came from michelin defenders which are silent. Waiting to see what my range impact is but not really worried about it.

 

[wavrdn]

I’m tempted to go with the LT for my next set for this reason. I’m close to 25k miles on the SL and will probably need a replacement in the next few months. Haven’t had any issues yet, thankfully.

You only got 25k miles out of the SL? Aren't they warrantied for 50k?

Sponsored