Tire Scouter

315/40R21 tires

Compare 23 models made in this size across 7 categories, ranked by spec score, then confirm fitment for your vehicle.

Spec scores are estimates from five manufacturer specs, not road tests. How we score

Shop 315/40R21 tires at Tire Rack

See tires in this size, then confirm the load index and speed rating your vehicle needs.

We may earn a commission from retailer links. Learn more

Shop 315/40R21 at Tire Rack
Our top pick in 315/40R21

Goodyear Eagle F1 Asymmetric 5

  • Ultra high performance summer

Best for wet-weather performance seekers.

The Goodyear Eagle F1 Asymmetric 5 is a compelling choice for those who prioritize wet grip and longevity in an ultra-high-performance summer tire.

  • Wet grip score of 9 significantly exceeds the category average of 7.6, making it a strong performer in rainy conditions.
  • Handling score of 8 aligns with the category's focus on responsive driving dynamics.
  • 60,000-mile treadwear warranty is notably higher than the category average of 37,754 miles, offering extended longevity for an ultra-high-performance tire.
Full analysis

The highest spec score among ultra high performance summer tires in this size that we have analysis for, the most common category for 315/40R21.

80Strong
None listed
300
AA
Y · 186 mph

Every scale below runs from the lowest to the highest spec score among the 17 scored tires in 315/40R21 (56 to 80).

Best ultra high performance summer tires in 315/40R21

12 models, highest spec score first.

All ultra high performance summer tires

  1. Goodyear Eagle F1 Asymmetric 5

    Best for wet-weather performance seekers.

    80StrongFrom 4 of 5 specs
    Warranty
    None listed
    Treadwear
    300
    Traction
    AA
    Speed rating
    Y · 186 mph
    • Wet grip score of 9 significantly exceeds the category average of 7.6, making it a strong performer in rainy conditions.
    • Handling score of 8 aligns with the category's focus on responsive driving dynamics.
    • The T speed rating is a mismatch for an ultra-high-performance tire, which may deter high-speed enthusiasts.

  2. Yokohama ADVAN Sport V107E

    Best for dry-weather enthusiasts.

    66Good
    Warranty
    50k mi
    Treadwear
    240
    Traction
    A
    Speed rating
    W · 168 mph
    • Dry grip and handling both score a perfect 10, leading the ultra-high-performance summer category where the average is 8.7.
    • Treadwear warranty of 55,000 miles significantly exceeds the category average of 37,754 miles, offering better longevity than many competitors.
    • Wet grip performance is below the category average, which may deter those who frequently drive in rainy conditions.

  3. Michelin Latitude Sport 3

    Best for performance enthusiasts.

    65Good
    Warranty
    20k mi
    Treadwear
    220
    Traction
    AA
    Speed rating
    Y · 186 mph
    • Dry grip and wet grip both score 9, surpassing the category averages of 8.7 and 7.6 respectively, making it a strong performer in both conditions.
    • Handling score of 9 ensures precise steering response, ideal for spirited driving.
    • The low treadwear rating of 220 suggests a shorter lifespan, which may not suit budget-conscious drivers seeking longevity.

  4. Michelin Pilot Sport 4

    Best for enthusiast drivers.

    61Good
    Warranty
    20k mi
    Treadwear
    320
    Traction
    A
    Speed rating
    Y · 186 mph
    • Dry grip score of 9, surpassing the category average of 8.7, makes it a strong choice for spirited driving.
    • Handling score of 9 aligns with top performance expectations in this segment, providing responsive cornering.
    • Wet grip performance lags behind the category average, which could be a dealbreaker for those in rainy climates.
Show 8 more ultra high performance summer tires

  1. Michelin Pilot Sport 4 SUV

    Best for performance SUV owners.

    56Fair
    Warranty
    20k mi
    Treadwear
    220
    Traction
    A
    Speed rating
    H · 130 mph

  2. Continental ContiSportContact 6

    Severe-snow rated

    Best for performance enthusiasts.

    72StrongFrom 2 of 5 specs
    Warranty
    60k mi
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    V · 149 mph

  3. Continental ContiSportContact 5 CSI

    Severe-snow rated

    Best for dry weather enthusiasts.

    72StrongFrom 2 of 5 specs
    Warranty
    60k mi
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    V · 149 mph

  4. Hankook Ventus S1 evo Z AS X

    Severe-snow rated

    Best for enthusiastic drivers.

    60GoodFrom 2 of 5 specs
    Warranty
    45k mi
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    H · 130 mph

  5. Toyo Proxes Sport

    Best for wet-weather enthusiasts.

    56FairFrom 2 of 5 specs
    Warranty
    25k mi
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    Y · 186 mph

  6. Goodyear Eagle F1 Asymmetric 5 SCT

    Best for track-day enthusiasts.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    Y · 186 mph

  7. Pirelli P Zero PZ4 Sport

    Severe-snow rated

    Best for performance enthusiasts.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    V · 149 mph

  8. Atturo AZ850

    Best for dry-weather enthusiasts.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    Y · 186 mph

Best highway all-season truck tires in 315/40R21

3 models, highest spec score first.

All highway all-season truck tires

  1. Hankook Dynapro HPX

    Best for long-distance highway drivers.

    74Strong
    Warranty
    70k mi
    Treadwear
    560
    Traction
    A
    Speed rating
    H · 130 mph
    • Treadlife warranty of 70,000 miles exceeds the highway all-season truck category average of 61,048 miles, promising longer service life.
    • Dry grip score of 8.5 surpasses the category average of 7.7, offering reliable traction on dry roads.
    • Lacks a 3PMSF rating, making it unsuitable for drivers needing reliable winter performance.

  2. Toyo Open Country Q/T

    Best for highway commuters.

    66GoodFrom 3 of 5 specs
    Warranty
    50k mi
    Treadwear
    520
    Traction
    Not graded
    Speed rating
    W · 168 mph
    • Treadwear warranty of 65,000 miles exceeds the category average of 61,048 miles, offering above-average durability.
    • Dry grip score of 8.5 outperforms the highway all-season truck category average of 7.7, making it a solid choice for dry road conditions.
    • Wet grip performance is subpar, making it less suitable for regions with frequent rain.

  3. Continental CrossContact LX Sport

    Severe-snow rated

    Best for high-mileage truck drivers.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    H · 130 mph
    • Outstanding treadlife with an 80,000-mile warranty, significantly above the category average of 61,048 miles.
    • Dry grip score of 8.5 exceeds the category average of 7.7, making it a strong performer for on-road handling.
    • If wet grip is a priority, this tire's below-average score in that area may be a dealbreaker.

Best winter tires in 315/40R21

3 models, highest spec score first.

All winter tires

  1. Pirelli Scorpion Winter

    Severe-snow rated

    Best for winter highway commuters.

    71Good
    Warranty
    60k mi
    Treadwear
    500
    Traction
    A
    Speed rating
    H · 130 mph
    • 60,000-mile treadwear warranty exceeds the winter category average of 54,431 miles, offering longer usage before replacement.
    • Snow traction score of 8 matches the category average, ensuring reliable performance in typical winter conditions.
    • Lack of ice traction data may be a concern for those facing frequent icy conditions.

  2. Nokian Hakkapeliitta R5 SUV

    Severe-snow rated

    Best for snowbelt SUV owners.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    T · 118 mph
    • Snow traction score of 8 matches the winter category's expectations, making it reliable for snowy conditions.
    • Treadwear warranty of 65,000 miles exceeds the category average of 54,431 miles, offering longer service life than many winter tires.
    • Lack of ice traction data might be a concern for those prioritizing icy surface performance.

  3. Nokian Hakkapeliitta 10 SUV

    Severe-snow rated

    Best for drivers prioritizing dry grip.

    Not enough spec data
    Warranty
    None listed
    Treadwear
    Not graded
    Traction
    Not graded
    Speed rating
    T · 118 mph
    • Dry grip score of 8.5 is well above the winter category average of 7.1, making it a strong performer on cold, dry pavement.
    • Handling score of 8.5 suggests responsive steering, which is beneficial for maneuvering in winter conditions.
    • Lack of 3PMSF certification may deter those needing guaranteed severe snow performance.

Best all-terrain tires in 315/40R21

2 models, highest spec score first.

All all-terrain tires

  1. Pirelli Scorpion Zero All Season

    Best for long-distance drivers.

    77StrongFrom 4 of 5 specs
    Warranty
    None listed
    Treadwear
    500
    Traction
    A
    Speed rating
    Y · 186 mph
    • Off-road traction is supported by a robust tread pattern and a UTQG treadwear rating of 500, promising durability.
    • Treadwear warranty of 60,000 miles exceeds the category average of 55,717 miles, offering longer coverage than many competitors.
    • If severe winter performance is a priority, the lack of 3PMSF certification means this tire might not meet your needs.

  2. Yokohama Geolandar X-CV

    Best for on-road focused SUV drivers.

    72Strong
    Warranty
    50k mi
    Treadwear
    520
    Traction
    A
    Speed rating
    W · 168 mph
    • Dry grip score of 8 outperforms the all-terrain category average of 6.6, providing solid on-road traction.
    • Handling score of 8 is above average for the segment, making it a good choice for drivers who prioritize responsive steering.
    • Lacks a 3PMSF rating, making it less suitable for drivers who encounter severe winter conditions.

Best touring all-season tires in 315/40R21

1 model, highest spec score first.

All touring all-season tires

  1. BFGoodrich Advantage Control

    Best for long-distance commuters.

    73Strong
    Warranty
    65k mi
    Treadwear
    700
    Traction
    B
    Speed rating
    W · 168 mph
    • Above-average dry grip with a score of 8.5, surpassing the category average of 7.8.
    • Treadlife warranty of 65,000 miles is slightly above the category average, promising decent longevity.
    • Subpar wet grip performance compared to category peers, which could be a concern in regions with frequent rain.

Best grand touring all-season tires in 315/40R21

1 model, highest spec score first.

All grand touring all-season tires

  1. Michelin Primacy Tour A/S

    Best for commuters seeking dry road performance.

    71Good
    Warranty
    55k mi
    Treadwear
    540
    Traction
    A
    Speed rating
    H · 130 mph
    • Treadlife warranty of 55,000 miles is competitive, though slightly below the category average of 64,578 miles.
    • Dry grip score of 8.5 outperforms the category average of 7.8, providing reliable traction on dry roads.
    • The lower UTQG treadwear rating of 540 compared to the category average suggests a shorter lifespan, which could be a concern for high-mileage drivers.

Best performance all-season tires in 315/40R21

1 model, highest spec score first.

All performance all-season tires

  1. Bridgestone Alenza Sport A/S

    Best for comfort-focused drivers.

    68Good
    Warranty
    40k mi
    Treadwear
    500
    Traction
    A
    Speed rating
    V · 149 mph
    • Comfort and noise scores of 8 align with category benchmarks, ensuring a quiet and smooth ride.
    • Wet grip rating of 7.5 exceeds the category average of 6.9, providing reliable performance in rainy conditions.
    • The 40,000-mile treadwear warranty is well below the category average, which means more frequent replacements and higher long-term costs.

Popular brands in 315/40R21

The number beside each brand is how many of its models come in this size.

What 315/40R21 means

315/40R21 designates a tire 315 mm (12.4") wide with a sidewall 40% as tall as it is wide — about 126 mm (5.0") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 30.9", a circumference of about 97.1", and approximately 652 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

Of the 23 315/40R21 tire models we track, the most common category is ultra high performance summer (12 models), followed by highway all-season truck (3) — a good indicator of the kind of vehicles and driving this size is designed for.

Sidewall height
126 mm
Overall diameter
30.9 in
Circumference
97.1 in
Revs per mile
652

Frequently asked questions

What does 315/40R21 mean?

315/40R21 breaks down as follows: 315mm is the tire's section width (the widest point), 40 is the aspect ratio (sidewall height as a percentage of width), R means radial construction, and 21 is the wheel diameter in inches.

What vehicles use 315/40R21 tires?

315/40R21 is a standard tire size found on many trucks, SUVs, and crossovers. Use our vehicle search to confirm your exact fitment.

How tall is a 315/40R21 tire?

A 315/40R21 tire has a sidewall height of about 126 mm (5.0") and an overall diameter of roughly 30.9", turning approximately 652 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

315/40R21 research guides

Summer vs all-season tires

Where summer tires lose grip, the cold-cracking risk, and what all-season tires trade for their range.

Read the guide

Speed rating chart

A practical chart for common tire speed ratings and what they mean for everyday driving.

Read the guide

Changing tire size

Plus-sizing and alternate sizes: diameter limits, load and speed ratings, and speedometer error.

Read the guide

Confirm 315/40R21 fits your vehicle

Wheel size can vary by trim and option package. Enter your year, make, model, and trim to verify fitment before you order.

Check my vehicle