Tire Brand: Nitto

Tire Model: NT421Q

Check Nitto NT421Q tire size chart to find maximum tire inflation as set by manufacturer for your Nitto NT421Q tire size. Remember that tire pressure value printed on Nitto NT421Q tire sidewall is a maximum tire pressure that Nitto NT421Q tire can support when carrying its maximum weight capacity, and it is not a recommended tire pressure setting for your vehicle.

Keep in mind that Nitto NT421Q tires can naturally lose 1 to 2 psi of tire pressure monthly, so check Nitto NT421Q tire pressure regularly to keep tires inflated at recommended level.

Tire pressure is also affected by changes in temperature. As a rule, tire pressure for Nitto NT421Q tires will change by about 1 psi for every 10 degrees Fahrenheit change in atmospheric temperature. Maintain proper Nitto NT421Q winter tire pressure by compensating air pressure to your vehicle's recommended tire pressure level when temperatures drop.


Nitto NT421Q Tire Inflation Chart

Nitto NT421Q tire pressure chart with maximum tire inflation for each tire size.

Tire Size Load Index Speed Rating Max Tire Pressure
225/55R18 102 V 50 psi
225/55R19 103 V 50 psi
225/60R17 103 V 50 psi
225/65R17 106 H 50 psi
235/50R19 103 V 50 psi
235/55R18 104 V 50 psi
235/55R19 105 W 50 psi
235/55R20 105 W 50 psi
235/60R17 106 H 50 psi
235/60R18 107 W 50 psi
235/65R17 108 H 50 psi
235/65R18 110 H 50 psi
245/50R20 105 V 50 psi
245/55R19 107 H 50 psi
245/60R18 109 H 50 psi
245/65R17 111 H 50 psi
255/45R20 105 W 50 psi
255/50R19 107 V 50 psi
255/50R20 109 V 50 psi
255/55R18 109 V 50 psi
255/55R19 111 V 50 psi
255/55R20 110 H 50 psi
255/60R17 110 V 50 psi
255/60R19 113 H 50 psi
255/65R18 115 H 50 psi
265/50R19 110 V 50 psi
265/50R20 111 V 50 psi
265/60R18 114 V 50 psi
265/65R18 114 H 51 psi
275/40R20 106 W 50 psi
275/45R20 110 W 50 psi
275/50R20 113 H 50 psi
275/55R17 109 V 51 psi
275/55R20 117 V 50 psi
275/60R20 115 H 51 psi
285/45R22 114 V 50 psi

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