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Nitto NT 421Q Review & Rating

Nitto NT 421Q Review & Rating Rating

Product Overview

  • Dry and wet traction
  • Smooth and very quiet ride
  • Tread life
  • Deep snow and ice
Bottom Line: 4 / 5

Designed from the ground up with the latest in tire technology, the new Nitto NT 421Q premium high performance all-season tire is built specifically for drivers of SUV’s and crossovers. Nitto claims this new model delivers an exceptionally quiet and comfortable ride, dependable traction in year round road conditions and a warranty that is considered to be the best in its class. So we decided to put it to a test and find out for ourselves how well this model performed.


As we expected, the dry traction on these tires is solid and on par with the better tires in this class. The 3D siping on the inner tread blocks increase braking and acceleration performance, something that was very noticeable in our testing.

We found the 421Q to be a very effective tire in wet conditions as well, which we attribute to its wide circumferential grooves, tapered edges and added sipes that push out water for better overall traction.

Nitto NT 421Q

 Cornering – Steering

Cornering grip on roads is especially important for SUVs and CUVs, and this is something that Nitto paid attention to as well. The tires deliver a firm grip on the road even when we stepped on the gas a bit in taking a few corners. While the inner tread blocks 3D siping helped with traction, the same technology is used on the outer tread blocks, which helps these tires with enhanced cornering control and tire stability.

Winter Handling

Nitto NT 421QWinter handling is a problem that very few all-season tires have managed to deal with, which is why having dedicated winter tires is recommended. Still, we decided to check winter handling performance of these tires and came away quite surprised. Handling during mediocre winter conditions with these tires is actually pretty good. We suspect the reason for this is its tread design, which exhibits heavy siping and a higher void to tread ratio. That said, when the snow piles up the tire shows that it is not a dedicated winter model, so keep that in mind.

Ride Comfort – Road Noise

The ride comfort that the Nitto 421Q provides is also worth a mention because this tire delivers outstanding comfort and a very quiet ride. Nitto’s Quiet Serration Technology in the circumferential groove edges helps eliminate reverberating and repetitive road noise, which we found to work extremely well. The addition of rubber inserts in the sidewalls also improve the smoothness of the ride.

Tread Life

Nitto NT 421QThe Nitto NT 421Q comes with a UTQG rating of 640, which means that it should be capable of handling around 75, 000 miles quite comfortably. Tread life is quite good considering the fact that they are high performance all-season tires. Their expected tread life becomes even more impressive if one considers their lower price.

Another point worth mentioning is the built-in wear indicators that Nitto has added. It makes it quick and easy to see just how much tread is left on the tire at any time.


There are two different warranties offered on these tires with variation due to the different speed ratings offered. Tires with W-speed ratings get a warranty for 60,000 miles, while tires with H and V-speed ratings come with a warranty of 75,000 miles.

Based on the overall performance of the 421Q, Nitto has managed to build a good quality tire that will suit just about any SUV or crossover owner.

Nitto NT 421Q

Click Here For Current Prices On The Nitto NT 421Q

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