The sticker on the door says 42psi with no qualification for number of riders. That seems high! Dealer set all 4 tires to 38psi which seems to have been recommended for prior model years. It’s a MY21. Should I increase to 42 or leave as is?
42 psi / 290 kpa tire pressure for MY21 T8 XC90??
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T8 or not T8
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The original set of tires that came with it I did not rotate and they were wearing evenly, likely from driving primarily on Pure and keeping the fronts from being overworked by steering and propelling. On this second set of Pirelli I rotated when I swapped tires (going from summer to winter and back). They only lasted 1.5 summers (18k). Although for these the rears wore much faster but it's from all of the high speed towing we did over the summer months. I'm undecided if I'll put these back on in April next year or just get new tires. I'd rotate them if I do use them one more season (or at least part of it) if we plan on another big camping vacation (towing).
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I’ve kept my tyres at 42psi for a long time now and it seems to work fine. I got new tyres fitted last month (21” Continental) and they said that 38psi is fine but I’m wondering if they kept in mind that a t8 is heavier than a regular xc90 so I rather stick with 42psi.
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I would follow the manual of 42 because the tire maker (like you said) doesn’t know the weight of the car. Could be a sedan or a Tahoe.
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Yeah, my thoughts exactly. I guess if I keep it quite a bit under 50psi (max for the tyres) I should be fine. It also helps with fuel economy.
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As an update, I’ve kept my t8 at 42 generally and when I went to replace my tires the centers were a bit more tread meaning still slightly underinflated (so on average lower than 42 since I only topped up occasionally but never less than 38 since that would trigger the TPMS)
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