Nitto NT421Q - 235/55R18
NT421Q 235/55R18 Tire Specs
| Size | Diameter | Width | Rim Range |
Measured Rim |
Tread Depth |
Load Range |
Max Load |
Max psi |
Max Speed |
Weight | Sidewall Letters |
Revs/Mile | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 235/55R18 104V XL BSW 640 A A |
28.15" | 9.65" | 6.5-8.5" | 7.5" | 12/32" | Extra Load | 1984 lbs | 50 psi | 149 mph | 31.6 lbs | Black | 738 | Show Specs |
Available
(Last Checked 10/26/25)
(Last Checked 10/26/25)
The Nitto NT421Q is a premier all season tire intended for use on SUVs and CUVs. It is a radial tire that provides excellent handling and traction in all weather environments including snow, while delivering a smooth ride. The NT421Q comes in H and V and W-speed rated sizes.
The 235/55R18 Nitto NT421Q has a diameter of 28.15", a width of 9.65", mounts on a 18" rim and has 738 revolutions per mile. It weighs 31.6 lbs, has a max load of 1984 lbs, a maximum air pressure of 50 psi, a tread depth of 12/32" and should be used on a rim width of 6.5-8.5".
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