They are P-metric.
I completely understand the point that an E-rated tire can be tougher, but it’s important to remember what the E actually represents. The “E” is a load rating, not a puncture rating. It means the tire is engineered to carry more weight at higher pressures, which usually requires a heavier carcass and a much stiffer sidewall, sometimes with additional plies. But that doesn’t automatically translate into better puncture resistance.
Some P-metric A/Ts have far more robust sidewall and belt construction than others. My P-metric KO2s have taken the same ranch and lease roads for almost twenty years without a single non-repairable puncture. My wife’s GX is on P-metric KO2s with the same results.
And on a vehicle like the LC250, the factory suspension is tuned around lighter P-metric or XL tires. Moving to an E-load tire adds significant unsprung weight which changes how the suspension reacts to bumps. It’s a viable option, but it comes with tradeoffs.
To me, the issue seems less about choosing SL versus E, and more about the Toyo A/T III’s construction being noticeably weaker than is appropriate for a true AT tire and I want to warn folks.
That being said, I will definitely do some more research..
Yes, those darn thorns!