315/40R21 Tire Pressure Chart

Corresponding tire load capacity at specified tire inflation pressures for 315/40R21 tires.

Tire Size 26 psi 29 psi 32 psi 35 psi 36 psi 38 psi 41 psi 42 psi
315/40R21 (111 SL) 1841 lbs 2011 lbs 2174 lbs 2337 lbs 2403 lbs (111 SL)
315/40R21 (115 XL) 1823 lbs 1991 lbs 2152 lbs 2313 lbs 2366 lbs 2469 lbs 2626 lbs 2679 lbs (115 XL)
Tire Size 26 psi 29 psi 32 psi 35 psi 36 psi 38 psi 41 psi 42 psi
315/40R21 111 SL 1841 lbs 2011 lbs 2174 lbs 2337 lbs 2403 lbs (111 SL)
315/40R21 115 XL 1823 lbs 1991 lbs 2152 lbs 2313 lbs 2366 lbs 2469 lbs 2626 lbs 2679 lbs (115 XL)

315/40R21 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.

315/40R21 111 SL is a Standard Load tire with a load index of 111 and a maximum tire load capacity of 2403 lbs @ 36 psi, capable of supporting up to 2403 pounds or 1090 kilograms when inflated to its maximum air pressure of 36 pounds per square inch (psi) or 248 kilopascals (kPa).

315/40R21 115 XL is an Extra Load tire with a load index of 115 and a maximum tire load capacity of 2679 lbs @ 42 psi, capable of supporting up to 2679 pounds or 1215 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.

Amazon eBay TireRack

Tires with 315/40R21 tire size

9 tire models are available in 315/40R21 tire size. Click on tire model to check its inflation and load capacity values.

Vehicles with 315/40R21 tire size

315/40R21 tire size is used for original equipment tires on 10 vehicles. Click on vehicle model to find its recommended tire pressure for 315/40R21 tires.

Replacement tire sizes compatible with 315/40R21 tire

315/40R21 tire can be replaced with 28 compatible tire sizes. Click on tire size to see its load and inflation table.