Tire Warning

[AllBoostNoEco]

Uhm... LT 265/70r17 bfg ko2, E rating truck tires. Max psi on sidewall: 80.

NOT passenger tires

Ah, wasn’t clear you were running LT tires as well. But Load Range E are 2470 pounds at 50 PSI. If you’re consistently running that heavy, should be a comfortable number for your tires. Definitely will ride rougher, but a small trade off.

 

[AllBoostNoEco]

Other question, why would the sticker on the door apply to non-OEM tires? The manufacturer has no idea what tires I put on after replacing the factory tires. On my wife's vehicle I swapped the OEMs with max psi of ~41 to an XL load tire with max PSI of 50 psi.

(I still remember the Explorer recommending 28 psi.....)

Is the general consensus here saying that the suspension of the vehicle is also relying in springy tires and that "too stiff of a tire - (" too high psi") - will harm the suspension? Never heard that before.

I usually keep the psi on the high side, but below limits, as I prefer the stiffer ride versus the spongy ride of the door placard.

I’m not sure there is a general consensus. I’ve pulled my data from the Tire and Rim Association Load vs pressure tables, as they are the ones who determined the standard P-metric and LT-metric tires are rated by. Once you change from one load range and size tire to another (C to E, 265/70R17 to 275/70R18, P-metric to LT-metric, etc), the door placard becomes nothing more than a way to determine what pressure you should be using on your new tires. Sometimes it may be correct, but other times it could be way off.

 

[bobmbx]

Other question, why would the sticker on the door apply to non-OEM tires? The manufacturer has no idea what tires I put on after replacing the factory tires. On my wife's vehicle I swapped the OEMs with max psi of ~41 to an XL load tire with max PSI of 50 psi.

(I still remember the Explorer recommending 28 psi.....)

Is the general consensus here saying that the suspension of the vehicle is also relying in springy tires and that "too stiff of a tire - (" too high psi") - will harm the suspension? Never heard that before.

I usually keep the psi on the high side, but below limits, as I prefer the stiffer ride versus the spongy ride of the door placard.

The only thing that would "harmed" due to tire pressure is the tire itself. By harmed I mean uneven tread wear and/or structural damage. If you waaay over inflate a tire it can blowout...causing you to wreck your car. If you waaaaay under inflate a tire, it can separate from the rim....causing you to wreck your car. The pressure in a tire has no damaging effect on the suspension. As described in other posts here, you can experience rough/stiff ride, a spongy ride, even increase roll and sway due to tire pressure.

 

[Adieu]

Ah, wasn’t clear you were running LT tires as well. But Load Range E are 2470 pounds at 50 PSI. If you’re consistently running that heavy, should be a comfortable number for your tires. Definitely will ride rougher, but a small trade off.

Just tried bumping to 52 psi, handling seems improved, ride quality....same? Better maybe even?

PS i'm on brand new Rancho 9999xl's (currently set 6 F / 3 R as someone here recommended), but what are likely original control arms with 175k on em