Tire Size Guide

315/30R21 Tires

Compare 17 available models across 4 categories, then confirm fitment for your vehicle.

Our Top Pick in 315/30R21
Continental ContiSportContact 5P
Ultra High Performance SummerPerformance

The ContiSportContact 5P is a solid choice for drivers who value high performance in both dry and wet conditions.

Dry grip rating of 9, which is above the category average of 8.7, making it a strong performer for spirited driving. Wet grip also scores a 9, significantly higher than the category average of 7.6, providing confidence in rainy conditions. Handling score of 9 ensures precise steering and responsiveness, ideal for performance enthusiasts.
79Spec score (est.)
Full analysis
14 models

Best Ultra High Performance Summer Tires in 315/30R21

All Ultra High Performance Summer tires

The ContiSportContact 5P is a solid choice for drivers who value high performance in both dry and wet conditions.

  • Dry grip rating of 9, which is above the category average of 8.7, making it a strong performer for spirited driving.
  • Wet grip also scores a 9, significantly higher than the category average of 7.6, providing confidence in rainy conditions.

If you prioritize high-speed capability, the Michelin Pilot Sport 4S with its higher speed rating might be a better choice.

Treadwear 280Traction AA
Spec score79estimated
Details

The ADVAN Sport V107 is a compelling option for drivers who prioritize dry and wet grip above all else.

  • Perfect dry grip score of 10, surpassing the category average of 8.7, making it a top choice for high-performance driving.
  • Wet grip rating of 9, well above the category average of 7.6, ensures reliable performance in rainy conditions.

The lower treadwear warranty of 20,000 miles may deter those seeking longer-lasting performance tires.

Treadwear 240Traction AA
Spec score78estimated
Details
Pirelli P Zero RPerformance

The Pirelli P Zero R is a compelling choice for drivers seeking high levels of dry and wet grip, with both scoring a 9, surpassing the category averages.

  • Dry grip score of 9 matches the top end of the ultra-high performance summer category, exceeding the average of 8.7.
  • Wet grip also scores a 9, significantly above the category average of 7.6, making it a strong performer in wet conditions.

The lack of a treadwear warranty could be a concern for those looking for a longer-lasting performance tire.

Treadwear 280Traction AA
Spec score77estimated
Details

The Michelin Pilot Sport All Season 4 is a strong contender for drivers who prioritize grip and longevity in an ultra-high-performance summer tire.

  • Dry grip rating of 9 matches the best in the ultra-high-performance summer category, making it ideal for spirited driving.
  • Wet grip score of 9 exceeds the category average of 7.6, providing confidence in rainy conditions.

If comfort is a top priority, consider alternatives with higher comfort scores like the Pirelli P Zero (PZ4).

45,000 mi warrantyTreadwear 540Traction AA
Spec score76estimated
Details
Show 10 more ultra high performance summer options
Michelin Pilot Sport 4S

30,000 mi warranty · Treadwear 300

68
Michelin Pilot Sport Cup 2

30,000 mi warranty · Treadwear 180

65
Michelin Pilot Sport 4

20,000 mi warranty · Treadwear 320

61
Michelin Pilot Sport Cup 2 CN

30,000 mi warranty · Treadwear 500

55
Goodyear Eagle F1 Supersport

Specs on detail page

Goodyear Eagle F1 Supersport R

Specs on detail page

1 model

Best Touring All-Season Tires in 315/30R21

All Touring All-Season tires

The Pirelli Cinturato P7 AS NCS is a solid choice for drivers who prioritize dry grip and handling.

  • Treadwear rating of 500 suggests solid longevity, though no mileage warranty is provided.
  • Dry grip score of 8.5 exceeds the category average of 7.8, making it a strong performer on dry roads.

Lack of a treadwear warranty could be a concern for those looking for guaranteed long-term durability.

Treadwear 500Traction A
Spec score75estimated
Details
1 model

Best Grand Touring All Season Tires in 315/30R21

All Grand Touring All Season tires

The Pirelli Cinturato P7 All Season is a solid choice for drivers who value dry grip and handling.

  • Treadwear rating of 500 suggests decent longevity, though no specific mileage warranty is provided.
  • Dry grip score of 8.5 surpasses the category average of 7.8, offering confident handling on dry roads.

No treadwear mileage warranty, which may lead to higher long-term costs compared to competitors with guaranteed mileage.

Treadwear 500Traction A
Spec score75estimated
Details
1 model

Best Winter Tires in 315/30R21

All Winter tires

The Pirelli Winter Sottozero 3 is a solid choice for drivers seeking a winter tire with a long treadwear warranty.

  • 50,000-mile treadwear warranty is notable for a winter tire, offering longevity that many competitors don't match.
  • Dry grip score of 8.5 exceeds the winter category average of 7.1, making it a strong performer on clear roads.

Lack of ice traction data may be a concern for drivers who frequently encounter icy roads.

Spec scoreestimated
Details
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Popular Brands in 315/30R21

Size decoded

What 315/30R21 Means

315/30R21 designates a tire 315 mm (12.4") wide with a sidewall 30% as tall as it is wide — about 95 mm (3.7") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 28.4", a circumference of about 89.3", and approximately 709 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

95 mm

Sidewall height

28.4"

Overall diameter

89.3"

Circumference

709

Revs per mile

Of the 17 315/30R21 tire models we track, the most common category is ultra high performance summer (14 models), followed by touring all-season (1) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 315/30R21 mean?
315/30R21 breaks down as follows: 315mm 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 315/30R21 tires?
315/30R21 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 315/30R21 tire?
A 315/30R21 tire has a sidewall height of about 95 mm (3.7") and an overall diameter of roughly 28.4", turning approximately 709 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

315/30R21 Research Guides

Confirm 315/30R21 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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