Tire Size Guide

255/50R21 Tires

Compare 14 available models across 5 categories, then confirm fitment for your vehicle.

Our Top Pick in 255/50R21
Bridgestone Alenza Sport A/S
Touring All-SeasonComfort

The Bridgestone Alenza Sport A/S is tailored for drivers who value comfort and quietness in their everyday rides.

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. Handling score of 7.5 is competitive for a touring tire, offering responsive control for everyday driving.
73Spec score (est.)
Full analysis
5 models

Best Touring All-Season Tires in 255/50R21

All Touring All-Season tires

The Bridgestone Alenza Sport A/S is tailored for drivers who value comfort and quietness in their everyday rides.

  • 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.

Treadwear 500Traction A
Spec score73estimated
Details

The Hankook iON evo AS SUV is a solid choice for SUV owners prioritizing wet grip and comfort in a touring all-season tire.

  • Treadlife rating of 7.8 aligns with the category average, supported by a 50,000-mile warranty.
  • Wet grip score of 7.5 exceeds the category average of 6.9, providing reliable performance in rainy conditions.

The 50,000-mile warranty is shorter than the category average, which may not suit high-mileage drivers looking for long-term value.

50,000 mi warrantyTreadwear 600Traction A
Spec score70estimated
Details

The Goodyear Eagle Touring is best suited for drivers who prioritize dry and wet grip performance in a touring all-season tire.

  • Above-average dry grip score of 8.5, which exceeds the category average of 7.8.
  • Wet grip rating of 7.5 outperforms the category average of 6.9, providing better traction in rainy conditions.

The lack of a treadwear warranty and a low UTQG treadwear rating of 350 could mean more frequent replacements, increasing long-term costs.

Treadwear 350Traction A
Spec score69estimated
Details

The Michelin Primacy A/S is a solid choice for drivers who value dry grip and handling in a touring all-season tire.

  • Treadlife warranty of 55,000 miles is a solid offering, though it trails the category average of 64,578 miles.
  • Dry grip score of 8.5 surpasses the category average of 7.8, making it a strong performer in dry conditions.

The treadwear rating of 540 suggests a shorter lifespan compared to other touring all-season tires, impacting long-term value.

45,000 mi warrantyTreadwear 540Traction B
Spec score60estimated
Details
Show 1 more touring all-season option
Goodyear Eagle Touring SCT

Specs on detail page

3 models

Best Grand Touring All Season Tires in 255/50R21

All Grand Touring All Season tires

The Michelin Primacy Tour A/S is a solid choice for drivers who value dry grip and handling.

  • 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.

55,000 mi warrantyTreadwear 540Traction A
Spec score70estimated
Details

The Goodyear Efficient Grip Performance 2 is best suited for drivers who value comfort and noise control on long trips.

  • Comfort and noise scores of 8 align with the category average, making it a pleasant choice for long drives.
  • Wet grip rating of 7.5 slightly exceeds the category average of 7.4, indicating competent performance in rainy conditions.

The lack of a treadwear warranty and a low treadwear rating of 300 could lead to more frequent replacements, increasing long-term costs.

Treadwear 300Traction A
Spec score66estimated
Details

The Bridgestone Alenza 001 is tailored for drivers who prioritize performance attributes like dry grip and handling in a grand touring all-season tire.

  • Dry grip score of 8.5, significantly above the category average of 7.6, making it a strong choice for spirited driving.
  • Comfort and noise scores both at 8, matching the category benchmarks, which means it won't annoy you on long drives.

The lack of a treadwear warranty and a low treadwear rating of 300 could lead to more frequent replacements, increasing long-term costs.

Treadwear 300Traction A
Spec score66estimated
Details
3 models

Best Winter Tires in 255/50R21

All Winter tires

The Michelin Pilot Alpin 5 SUV is a solid choice for SUV owners who need dependable snow traction and a reasonable treadwear warranty.

  • Snow traction score of 8, which is solid for winter conditions and ensures reliable performance in snowy environments.
  • Treadwear warranty of 30,000 miles is a plus for a winter tire, providing some assurance on longevity.

If you prioritize a quiet and comfortable ride above all else, this tire's average noise and comfort scores might not meet your expectations.

30,000 mi warrantyTreadwear 500Traction A
Spec score63estimated
Details

The Hakkapeliitta R5 EV is a solid choice for winter drivers who prioritize treadlife and dry grip.

  • Treadlife score of 10 and an 80,000-mile warranty far exceed the winter category average of 54,431 miles.
  • Dry grip rating of 7.5 surpasses the category average of 7.1, which is beneficial for those unexpected dry winter days.

Lacks 3PMSF certification, which may not meet the needs of drivers in areas with severe snow conditions.

Spec scoreestimated
Details
Nokian Hakkapeliitta 10EVPerformance3PMSF SnowEV

The Nokian Hakkapeliitta 10EV is a winter tire that stands out for its dry grip and handling, both scoring 8.5, which are well above the category averages.

  • Dry grip score of 8.5 exceeds the winter category average of 7.1, providing strong performance on cold, dry roads.
  • Handling score of 8.5 is above average, making it responsive and controlled in winter conditions.

Lack of 3PMSF certification may deter those seeking assured winter performance in severe conditions.

Spec scoreestimated
Details
2 models

Best Ultra High Performance Summer Tires in 255/50R21

All Ultra High Performance Summer tires

The ContiSportContact 5 is a solid choice for drivers who prioritize grip above all else.

  • Dry grip score of 9 matches the highest in the ultra-high-performance summer category, making it a strong choice for spirited driving.
  • Wet grip rating of 9 significantly exceeds the category average of 7.6, offering reliable performance in wet conditions.

The lower treadwear rating of 280 suggests a shorter lifespan compared to alternatives like the Michelin Pilot Sport 4S, which may impact long-term value.

Treadwear 280Traction AA
Spec score75estimated
Details

The Pirelli P Zero (PZ4) is well-suited for drivers who prioritize wet grip in their ultra high performance summer tires.

  • Wet grip score of 9 exceeds the ultra high performance summer category average of 7.6, making it a strong performer in rainy conditions.
  • Dry grip and handling both score 8, which aligns well with the category's focus on performance driving.

The lack of a treadwear warranty could be a concern for buyers looking for a guaranteed lifespan from their performance tires.

Treadwear 280Traction AA
Spec score75estimated
Details
1 model

Best Max Performance Summer Tires in 255/50R21

All Max Performance Summer tires

The Goodyear Eagle NCT 5 EMT is a unique offering in the max performance summer category, primarily due to its 60,000-mile treadwear warranty, which is double the segment average.

  • Dry grip score of 9 surpasses the max performance summer category average of 8.2, making it a solid choice for spirited driving.
  • Handling rating of 9 aligns with its strong dry grip, providing precise steering response.

Wet grip performance is notably poor, making it a risky choice for drivers in regions with frequent rain.

Spec scoreestimated
Details
Fitment

Vehicles Using 255/50R21

+ 9 more vehicles use this size

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Popular Brands in 255/50R21

Size decoded

What 255/50R21 Means

255/50R21 designates a tire 255 mm (10.0") wide with a sidewall 50% as tall as it is wide — about 128 mm (5.0") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 31.0", a circumference of about 97.5", and approximately 650 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

128 mm

Sidewall height

31.0"

Overall diameter

97.5"

Circumference

650

Revs per mile

Of the 14 255/50R21 tire models we track, the most common category is touring all-season (5 models), followed by grand touring all season (3) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 255/50R21 mean?
255/50R21 breaks down as follows: 255mm is the tire's section width (the widest point), 50 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 255/50R21 tires?
255/50R21 is a common fitment for vehicles like the 2026 BMW iX, 2025 Rolls Royce Cullinan, 2025 Rolls Royce Phantom, 2025 Lincoln Nautilus and others. Always confirm your specific trim's fitment before purchasing.
How tall is a 255/50R21 tire?
A 255/50R21 tire has a sidewall height of about 128 mm (5.0") and an overall diameter of roughly 31.0", turning approximately 650 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

255/50R21 Research Guides

Confirm 255/50R21 fits your vehicle

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