No, your 33x12.50 tires are definitely (!) not supposed to be at 35 psi. If you read that 35 psi on the sidewall, realize that's not what the tires are supposed to be inflated to. The psi molded onto an automotive tire's sidewall is only the tire's maximum allowable safe air pressure which would only ever be used if the tire was forced to carry its maximum possible load. Since vehicle tires are designed to be run at about 50% of their max safe load, to give a safety margin, you would never inflate the tire to that pressure.
Not to mention the same exact tire might be mounted on 20 different vehicles that all weigh differently and the same air pressure would of course not be correct for all of them. The correct air pressure depends on the vehicle weight. So for automotive tires, the tire pressure on the sidewall is never correct. Where the psi amount on the sidewall is correct to use is on other types of tires like trailer tires and bicycle tires.
26 psi is definitely appropriate for 33x12.50 tires for a lightly loaded Jeep, go no higher than 28 psi when it's fully loaded with people and/or gear. The bigger the tire, the less air pressure it requires. Which is why my Bianchi road bike's skinny racing tires were inflated to 115 psi to carry just me and the bike. For my 35x12.50 tires, my street pressure is 24/26 psi.
Not to mention the same exact tire might be mounted on 20 different vehicles that all weigh differently and the same air pressure would of course not be correct for all of them. The correct air pressure depends on the vehicle weight. So for automotive tires, the tire pressure on the sidewall is never correct. Where the psi amount on the sidewall is correct to use is on other types of tires like trailer tires and bicycle tires.
26 psi is definitely appropriate for 33x12.50 tires for a lightly loaded Jeep, go no higher than 28 psi when it's fully loaded with people and/or gear. The bigger the tire, the less air pressure it requires. Which is why my Bianchi road bike's skinny racing tires were inflated to 115 psi to carry just me and the bike. For my 35x12.50 tires, my street pressure is 24/26 psi.
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