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- Plano, Texas, USA
We're talking apples to oranges. I didn't say 44 psi maximum inflation pressure tires are having the tire pressure or load limit issues although I prefer more safety margin on tire pressure range. There won't be much handling issue either as we normally put same recommended tire pressure for the tires we use. I was saying getting 51 psi MIP tires is better to match OE tire specs and recommended tire pressure (foot print), and it also usually means the tire is better designed (lighter weight but stronger) with higher inflation pressure spec for the same load index (durability and safety margin).My point is that typical CUV owners will never encounter load limits and should base their decision on handling characteristics. If this were a work truck hauling substantial weight around everyday, and where handling is a secondary concern, then yes, load limits should be paid closer attention.
Also, "IMO the difference of tire pressure recommendation is caused by the different specs of maximum inflation pressure." could simply be the result of being a higher sidewall profile tire or some other different combination of factors. They are entirely different tires made by different companies.
I don't really get the obsession with max tire pressure. Any of the recommended tires will handle the typical use load fine. If safety is the issue, go with what handles best, not what carries a theoretical load that far exceeds what the vehicle is rated for.
IMO, the higher max pressure tires are probably meant for heavier vehicles/light trucks. "Extra Duty" in tire parlance. "Extra Duty" tires are not known for being the best in handling because that's not their design case. The Toyo's are interesting case though, it could be they're adapted from such a design.
If you check the comparison table I created for 225/55R19 tires, 10 out of 13 tires have 51 psi maximum inflation pressure with the same 99 load index and most of them are standard "Grand Touring" tires and none of them is "Extra Duty" truck tire. Nitto NT421Q has 103 load index and 50 psi maximum inflation pressure. Only Michelin Premier LTX and Pirelli Cinturato P7 carry 44 psi maximum inflation pressure.