Tire Size Guide

305/30R21 Tires

Compare 22 available models across 5 categories, then confirm fitment for your vehicle.

Our Top Pick in 305/30R21
Yokohama ADVAN NEOVA AD09
Ultra High Performance SummerPerformance

The ADVAN NEOVA AD09 is a compelling choice for drivers who prioritize grip and handling above all else.

Perfect dry grip score of 10, significantly above the category average of 8.7, makes it ideal for spirited driving on dry roads. Wet grip rating of 9 outperforms the category average of 7.6, offering reliable performance in wet conditions. Handling score of 10 ensures precise and responsive control, aligning with the tire's ultra-high performance intent.
77Spec score (est.)
Full analysis
13 models

Best Ultra High Performance Summer Tires in 305/30R21

All Ultra High Performance Summer tires

The ADVAN NEOVA AD09 is a compelling choice for drivers who prioritize grip and handling above all else.

  • Perfect dry grip score of 10, significantly above the category average of 8.7, makes it ideal for spirited driving on dry roads.
  • Wet grip rating of 9 outperforms the category average of 7.6, offering reliable performance in wet conditions.

The tire's treadwear rating of 200 indicates a potentially shorter lifespan, which could be a concern for those seeking longevity.

Treadwear 200Traction AA
Spec score77estimated
Details

The Goodyear Eagle F1 Asymmetric 3 is a strong contender for drivers focused on dry grip and handling, boasting perfect scores in both areas.

  • Top-notch dry grip and handling scores of 10, surpassing the ultra-high performance summer category average of 8.7.
  • Wet grip rating of 9 is well above the category average of 7.6, providing confidence in rainy conditions.

If a quieter ride is a priority, look elsewhere as noise levels are only average.

Treadwear 300Traction AA
Spec score75estimated
Details

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.

The T speed rating is a mismatch for an ultra-high-performance tire, which may deter high-speed enthusiasts.

Treadwear 300Traction AA
Spec score75estimated
Details

The Hankook Ventus S1 AS is a compelling choice for drivers who prioritize dry grip and handling above all else.

  • Perfect dry grip score of 10, surpassing the category average of 8.7, ideal for spirited driving on dry roads.
  • Handling score of 10 aligns with its dry grip, making it a strong performer for drivers who prioritize cornering and responsiveness.

Wet grip performance is below average for the category, making it less suitable for drivers in rainy climates.

50,000 mi warrantyTreadwear 560Traction A
Spec score73estimated
Details
Show 9 more ultra high performance summer options
Michelin Pilot Sport 4S

30,000 mi warranty · Treadwear 300

68
Hankook iON evo

Treadwear 320

68
Yokohama ADVAN Sport V107

20,000 mi warranty · Treadwear 240

66
Toyo Tire Proxes Sport A/S

40,000 mi warranty · Treadwear 550

63
Yokohama ADVAN Apex

25,000 mi warranty

56
54
Pirelli P Zero PZ4 Sport

Specs on detail page

6 models

Best Winter Tires in 305/30R21

All Winter tires

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.

55,000 mi warrantyTreadwear 550
Spec score69estimated
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.

55,000 mi warrantyTreadwear 550
Spec score69estimated
Details
Michelin Pilot Alpin 5Performance3PMSF Snow

The Michelin Pilot Alpin 5 is a winter tire well-suited for drivers who face a mix of dry and snowy conditions.

  • Dry grip score of 8.5 is significantly above the winter category average of 7.1, making it a strong performer in dry winter conditions.
  • Snow traction rating of 8 matches the category average, ensuring reliable performance in snowy conditions.

If you prioritize comfort and low noise for long winter drives, consider alternatives like the Pirelli Scorpion Winter.

30,000 mi warranty
Spec score54estimated
Details

The Pirelli Winter 270 Sottozero S2 is geared towards drivers who prioritize dry grip and handling in winter conditions.

  • Dry grip score of 8.5 significantly exceeds the winter category average of 7.1, making it a solid choice for cold, dry conditions.
  • Handling is rated at 8.5, providing responsive control that is beneficial for spirited driving even in winter months.

Lack of 3PMSF certification makes it less suitable for drivers in regions with severe snow conditions.

Spec scoreestimated
Details
Show 2 more winter options
1 model

Best Touring All-Season Tires in 305/30R21

All Touring All-Season tires

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
1 model

Best Grand Touring All Season Tires in 305/30R21

All Grand Touring All Season tires

The Continental ProContact RX is tailored for drivers who prioritize dry grip and handling in a touring all-season tire.

  • Dry grip score of 9.5 significantly exceeds the category average of 7.8, making it a standout for dry road performance.
  • Handling score of 9.5 suggests precise steering response, ideal for drivers who value agility in a touring tire.

The 40,000-mile treadwear warranty is a significant drawback for those seeking long-lasting tires, as it falls short of the category average.

55,000 mi warrantyTreadwear 400Traction A
Spec score68estimated
Details
1 model

Best Performance All-Season Tires in 305/30R21

All Performance All-Season tires

The Goodyear Eagle Sport A/S is best suited for drivers who prioritize dry grip and handling in a performance all-season tire.

  • Dry grip score of 9 exceeds the category average of 8.4, making it a strong performer in dry conditions.
  • Handling rating of 9 aligns with its dry grip, providing responsive and predictable control.

The wet grip performance is notably below average, making it a poor choice for those in consistently wet climates.

50,000 mi warranty
Spec score63estimated
Details
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Popular Brands in 305/30R21

Size decoded

What 305/30R21 Means

305/30R21 designates a tire 305 mm (12.0") wide with a sidewall 30% as tall as it is wide — about 92 mm (3.6") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 28.2", a circumference of about 88.6", and approximately 715 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

92 mm

Sidewall height

28.2"

Overall diameter

88.6"

Circumference

715

Revs per mile

Of the 22 305/30R21 tire models we track, the most common category is ultra high performance summer (13 models), followed by winter (6) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 305/30R21 mean?
305/30R21 breaks down as follows: 305mm is the tire's section width (the widest point), 30 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 305/30R21 tires?
305/30R21 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 305/30R21 tire?
A 305/30R21 tire has a sidewall height of about 92 mm (3.6") and an overall diameter of roughly 28.2", turning approximately 715 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

305/30R21 Research Guides

Confirm 305/30R21 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.

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