255/40R18 Tire Pressure Chart

Proper tire load capacity at specified tire inflation pressures for 255/40R18 tires.

255/40R18 is a Metric tire size that comes with 2 tire load index and load range options.

Tire Size 26 psi 29 psi 32 psi 35 psi 36 psi (SL) 38 psi (XL) 41 psi 42 psi
255/40R18
SL 95
1168 lbs 1268 lbs 1378 lbs 1477 lbs 1521 lbs Show Specs
255/40R18
XL 99
1168 lbs 1268 lbs 1367 lbs 1466 lbs 1521 lbs 1565 lbs 1664 lbs 1709 lbs Show Specs

255/40R18 95 SL is a Standard Load tire with tire load index of 95 and maximum tire load capacity of 1521 lbs @ 36 psi.

Calculate proper tire load capacity for 255/40R18 95 SL tire within inflation range of 26 psi to 36 psi. Inflating 255/40R18 95 SL tire over 36 psi will not increase its maximum load carrying capacity of 1521 pounds.

When replacing vehicle's original equipment tires with 255/40R18 95 SL tire, calculate proper replacement tire inflation based on original tire's load capacity at its recommended tire pressure. Never overload 255/40R18 95 SL tire above its maximum load capacity of 1521 lbs.

Original Tire
is LT-Metric

255/40R18 99 XL is an Extra Load tire with tire load index of 99 and maximum tire load capacity of 1709 lbs @ 42 psi.

Calculate proper tire load capacity for 255/40R18 99 XL tire within inflation range of 26 psi to 42 psi. Inflating 255/40R18 99 XL tire over 42 psi will not increase its maximum load carrying capacity of 1709 pounds.

When replacing vehicle's original equipment tires with 255/40R18 99 XL tire, calculate proper replacement tire inflation based on original tire's load capacity at its recommended tire pressure. Never overload 255/40R18 99 XL tire above its maximum load capacity of 1709 lbs.

Original Tire
is LT-Metric

All listed data is for informational purposes only. TirePsi.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information. Always refer to vehicle owner's manual for recommended tire pressure settings. Never overinflate or overload a tire beyond its maximum capabilities listed on sidewall. For individual tire size, refer to its load and inflation table.

Tires with 255/40R18 tire size

79 tire models are available in 255/40R18 tire size. Click on tire model to check its maximum tire inflation and tire load capacity.

Vehicles with 255/40R18 tire size

255/40R18 tire size is used for original equipment tires on 51 vehicles. Click on vehicle model to find its recommended tire pressure for 255/40R18 tires.