Tire Pressure Tire Size

…capacity and air pressure the tire can hold. This is not telling you what air pressure to run, rather it's stating what air pressure not to exceed. The second area of confusion comes when an alternate tire size is being used. I like to explain this as the air pressure is a volume measurement.…

…inch difference in the overall diameter of the tires, as shown. This results in a negligible +/- four tenths of a mph speedometer variance. Related Links * Calculating Approximate Tire Dimensions * Contact Patch * North American Load & Pressure Markings * Tire Size Conversion Chart * Tire Size Guide

…low, remember, it usually represents about 20% of the tire's recommended pressure. Disadvantages of Overinflation An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more…

…today's closest equivalent Euro-metric or P-metric tire sizes for popular 1949 through 1980 tire sizes. Tire Size Conversion Chart Related Links * Calculating Approximate Tire Dimensions * Contact Patch * North American Load & Pressure Markings * P-Metric & Euro-Metric Tire Sizing * Tire Size Guide

…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…

…determine if the size(s) you have written down is the correct size(s) requested by the vehicle manufacturer. Beginning in 2003, vehicle manufacturers were directed to install information placards. Tire information placards identify the Original Equipment tire sizes and inflation pressures (including…

…tires featuring the ST size designation may be used at speeds between 66 and 75 mph (106 and 121 km/h) by increasing their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load. Do not exceed the wheel's maximum rated pressure. If the maximum pressure…

…tire pressure will have returned to the tire's maximum inflation pressure when next measured in "cold" conditions. A tire's "maximum inflation pressure" may be different than the assigned tire pressure used to rate the tire's "maximum load." For example, while a P-metric sized standard load tire's…

…Tire Tech: Air Pressure vs. Dry Performance Most drivers realize that tire load capacity is determined by tire size and inflation pressure. Larger tires and higher inflation pressures provide more load capacity, while smaller tires and lower tire pressures provide less. Correctly inflated tires…

…is about the size of a sheet of paper. Tire sidewalls are extremely pliable and soft; the entire load of your vehicle is carried by the air that fills the tires. For every 10-degree Fahrenheit shift in ambient air temperature, you can expect a fluctuation of 1 psi in tire pressure. Also, you'll…

…Tire Tech: Air Pressure vs. Wet Performance Most drivers realize that tire load capacity is determined by tire size and inflation pressure. Larger tires and higher inflation pressures provide more load capacity, while smaller tires and lower tire pressures provide less. An under-inflated tire will…