Regardless of size, a tire's handling and durability is directly tied to using the appropriate inflation pressure for the vehicle. With a variety of wheel and tire choices for new vehicles, it's essential to rely on the vehicle manufacturer to specify the appropriate inflation pressure for the tires. Using the vehicle's weight capacity for each axle and other considerations, the manufacturer can best calculate the psi needed to ensure the tire handles and performs well.

All too often, many drivers and mechanics assume the maximum tire pressure listed on the tire's sidewall is what is recommended for proper inflation. However, that number represents the maximum pressure that's safely allowed, but is likely higher than what is recommended by the vehicle manufacturer.

Tire pressure can vary on several things, including:

For best results, look for a placard on the inside of the driver's door or a similar chart in the owner's manual to determine the recommended psi for your application.

All too often, many drivers and mechanics assume the maximum tire pressure listed on the tire's sidewall is what is recommended for proper inflation. However, that number represents the maximum pressure that's safely allowed, but is likely higher than what is recommended by the vehicle manufacturer.

Tire pressure can vary on several things, including:

For best results, look for a placard on the inside of the driver's door or a similar chart in the owner's manual to determine the recommended psi for your application.

Assuming the tire size you listed is the original equipment size, then inflate to the PSI recommended by the car manufacturer. If it is an optional size, please call in for more information

Goodyear only gives us a maximum PSI for specific tire sizes, nothing that is vehicle specific. Given the load indexes of your tires are higher than stock (they can carry more load than OE), you can still safely use 36 PSI.

Assuming you have a Wrangler, then you can still use the recommended PSI from Jeep as the 18" tire has the same load capacity as the stock tires. Should be 30 psi front and 35 psi rear.

For 265/70R17 size, GM requires at least 30 PSI for reference.

I'll need a little more information on your vehicle (like the model year) as the only size we've used for your vehicle is a 255/45R18 at 30 PSI recommended. A 225/40R18 size would be 2 inches smaller in diameter so we'd never recommend that size for use on the CL550

While the Firestone has quite a bit more load capacity given its size and reinforced sidewall, we'd still have you at 35 PSI minimum to keep the tire happy. You can inflate to up to 80 PSI per Firestone, but since the Nissan does not have near the axle load capacity to do any heavy hauling you're still fine at 35 PSI. You can can go over that number (and up to 80 PSI cold) if you want to increase the firmness of the tire, but that would be up to you.

the BFGoodrich g-Force T/A KDW-2 on a 2000 camaro SS?

Its difficult to give a recommended PSI without knowing the tire size. Please give us a call for more information.

Thank you.

Even with the larger tire, the recommended PSI will still be enough to carry the weight of the vehicle safely (even at full load). If you want, you can go up to 36 PSI if you want to make the tires feel a little "firmer" without creating any irregular wear.

Without knowing the load rating for your axles, I'd have you run 36 PSI (cold) to make sure you the tires carry enough weight to be safe.

I'd have you run 36 PSI (cold) to make sure you the tires carry enough weight to be safe.

Without knowing the specific year and model of your car we could not recommend a tire pressure. For best results please call in with your vehicle information. Thanks !

Saturn requires 30 PSI for your tire size.

I'd have you use around 34 PSI given the low profile tire

The previous tires were the same size, but E-Rated and required 46 psi. What should be the recommended tire pressure for C-Rated tires.

I understand the 46 psi was due to the government recommendation for all E-Rated tires. This seems too high.

With a 6 ply or standard load tire, Toyota requires 32 PSI for reference

OEM BFGoodrich Rugged Trail T/A P275/65R18 114T SL

Replaced with Michelin LTX M/S2 LT275/65R18 123/120R E

When the tires were rotated, the tech looked at the door sticker,

and let out a bunch of air. These load-rated E "Light Truck" tires

look very under-inflated at 40psi. What PSI should they be at for

lightly-loaded highway driving?

80 PSI is max (cold) pressure for the Michelins, and while 40 PSI is safe to use from a load capacity standpoint the tire may look a little better at 50 psi.

Based on the weight of the Expedition, I'd have you use at least 40 PSI, and you can add pressure (up to 65 lbs. cold) to tune the tire for ride comfort or looks. (see Mark's post above)

Assuming you have the Yokohama AVID S33d, max cold pressure is 44 PSi per the manufacturer. Given that this is the Original Equipment size, you would follow Toyota's guideline of 32 PSi (cold).

215/45ZR17 91W extra load

We' recommend 35 PSI. If you changed wheels and tires, you may have to have a dealership reprogram the car for new sensors unless the old sensors were reused.

If your tires are 10 ply rated (also known as E load), 50 PSI would be ideal.

You are correct that at 29 PSI, the 235/75R15 will carry the same load as he 235/70R15 at 32 PSI. It's not going to hurt the taller tire to run the 32 PSI, so either setting is fine