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.