275/40R18 Tire Pressure Chart

Corresponding tire load capacity at specified tire inflation pressures for 275/40R18 tires.

Tire Size 26 psi 29 psi 32 psi 35 psi 36 psi 38 psi 41 psi 42 psi
275/40R18 (99 SL) 1310 lbs 1429 lbs 1545 lbs 1662 lbs 1709 lbs (99 SL)
275/40R18 (103 XL) 1312 lbs 1433 lbs 1550 lbs 1664 lbs 1704 lbs 1779 lbs 1889 lbs 1929 lbs (103 XL)
Tire Size 26 psi 29 psi 32 psi 35 psi 36 psi 38 psi 41 psi 42 psi
275/40R18 99 SL 1310 lbs 1429 lbs 1545 lbs 1662 lbs 1709 lbs (99 SL)
275/40R18 103 XL 1312 lbs 1433 lbs 1550 lbs 1664 lbs 1704 lbs 1779 lbs 1889 lbs 1929 lbs (103 XL)

275/40R18 is an Metric tire.

Use our Replacement Tire Pressure Calculator to calculate proper tire inflation for replacement tires to match the original equipment tire load capacity on your vehicle.

275/40R18 99 SL is a Standard Load tire with a load index of 99 and a maximum tire load capacity of 1709 lbs @ 36 psi, capable of supporting up to 1709 pounds or 775 kilograms when inflated to its maximum air pressure of 36 pounds per square inch (psi) or 248 kilopascals (kPa).

275/40R18 103 XL is an Extra Load tire with a load index of 103 and a maximum tire load capacity of 1929 lbs @ 42 psi, capable of supporting up to 1929 pounds or 875 kilograms when inflated to its maximum air pressure of 42 pounds per square inch (psi) or 290 kilopascals (kPa).

All listed data and/or calculations are for informational purposes only. TirePressure.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.

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Tires with 275/40R18 tire size

47 tire models are available in 275/40R18 tire size. Click on tire model to check its inflation and load capacity values.

Vehicles with 275/40R18 tire size

275/40R18 tire size is used for original equipment tires on 20 vehicles. Click on vehicle model to find its recommended tire pressure for 275/40R18 tires.

Replacement tire sizes compatible with 275/40R18 tire

275/40R18 tire can be replaced with 101 compatible tire sizes. Click on tire size to see its load and inflation table.