Tire Size Guide

245/40R21 Tires

Compare 14 available models across 3 categories, then confirm fitment for your vehicle.

Our Top Pick in 245/40R21
Pirelli P Zero Run Flat (PZ4)
Ultra High Performance SummerPerformance

The Pirelli P Zero Run Flat (PZ4) is a solid choice for those who prioritize wet grip, boasting a score of 9, which is well above the category average of 7.6.

Wet grip score of 9 is notably above the category average of 7.6, making it a strong performer in rainy conditions. Treadlife score of 7.5 is respectable for an ultra-high-performance summer tire, given the category's focus on grip and handling. Handling score of 8 aligns well with the category's performance expectations, providing a responsive driving experience.
76Spec score (est.)
Full analysis
10 models

Best Ultra High Performance Summer Tires in 245/40R21

All Ultra High Performance Summer tires

The Pirelli P Zero Run Flat (PZ4) is a solid choice for those who prioritize wet grip, boasting a score of 9, which is well above the category average of 7.6.

  • Wet grip score of 9 is notably above the category average of 7.6, making it a strong performer in rainy conditions.
  • Treadlife score of 7.5 is respectable for an ultra-high-performance summer tire, given the category's focus on grip and handling.

The 'R' speed rating may not satisfy drivers seeking the highest speed capabilities typical of ultra-high-performance summer tires.

Treadwear 320Traction AA
Spec score76estimated
Details

The Goodyear Eagle F1 Asymmetric 6 is tailored for drivers who prioritize dry grip and handling prowess.

  • Perfect dry grip and handling scores of 10, outperforming the category average of 8.7 — ideal for spirited driving.
  • Wet grip rating of 9 surpasses the category average of 7.6, providing strong performance in rainy conditions.

Average comfort and noise levels may deter those looking for a quieter, more refined ride in an ultra-high-performance tire.

Treadwear 260Traction AA
Spec score74estimated
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 220Traction AA
Spec score73estimated
Details

The Continental SportContact 7 stands out for its wet grip, scoring a 9 against the ultra-high performance summer category average of 7.6.

  • Wet grip score of 9 significantly exceeds the category average of 7.6, making it a strong performer in rainy conditions.
  • Dry grip and handling both score 8, providing a balanced performance for spirited driving.

Lack of a treadwear warranty and lower dry grip rating compared to competitors may deter track-focused buyers.

Treadwear 240Traction AA
Spec score73estimated
Details
Show 6 more ultra high performance summer options
Michelin Pilot Sport 4S

30,000 mi warranty · Treadwear 300

69
Michelin Pilot Super Sport ZP

30,000 mi warranty · Treadwear 300

65
Michelin Pilot Sport S 5

30,000 mi warranty · Treadwear 300

58
3 models

Best Grand Touring All Season Tires in 245/40R21

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 Bridgestone Alenza 001 RFT is best suited for drivers who prioritize comfort and noise levels in a grand touring all-season tire.

  • Comfort and noise scores of 8 match the category benchmarks, making it a quiet and smooth option for long drives.
  • Wet grip rating of 7.5 slightly exceeds the category average of 7.4, providing reliable performance in rainy conditions.

The lack of a treadwear warranty and a low treadwear rating of 300 suggest a shorter lifespan, which may not suit budget-conscious drivers.

Treadwear 300Traction A
Spec score66estimated
Details
Hankook iON evoPerformanceEV

The Hankook iON evo shines for drivers who prioritize dry grip and handling precision, with perfect scores of 10 in both areas, surpassing the category average.

  • Perfect dry grip and handling scores of 10, exceeding the category average of 8.7, make it a strong choice for spirited driving.
  • Treadlife score of 7.5 is above the category average, suggesting longer wear than many ultra-high-performance peers.

Wet grip performance lags behind some competitors, which could be a dealbreaker for drivers in consistently wet climates.

Treadwear 320Traction A
Spec score66estimated
Details
1 model

Best All-Terrain Tires in 245/40R21

All All-Terrain tires

The Pirelli Scorpion Zero All Season is a solid choice for those who need a durable all-terrain tire with a focus on treadlife and handling.

  • 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.

Treadwear 500Traction A
Spec score73estimated
Details
Fitment

Vehicles Using 245/40R21

+ 12 more vehicles use this size

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Popular Brands in 245/40R21

Size decoded

What 245/40R21 Means

245/40R21 designates a tire 245 mm (9.6") wide with a sidewall 40% as tall as it is wide — about 98 mm (3.9") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 28.7", a circumference of about 90.2", and approximately 702 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

98 mm

Sidewall height

28.7"

Overall diameter

90.2"

Circumference

702

Revs per mile

Of the 14 245/40R21 tire models we track, the most common category is ultra high performance summer (10 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 245/40R21 mean?
245/40R21 breaks down as follows: 245mm 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 245/40R21 tires?
245/40R21 is a common fitment for vehicles like the 2025 Lexus LC500, 2025 Volvo V90 Cross Country, 2025 BMW X4 xDrive, 2025 Karma Revero and others. Always confirm your specific trim's fitment before purchasing.
How tall is a 245/40R21 tire?
A 245/40R21 tire has a sidewall height of about 98 mm (3.9") and an overall diameter of roughly 28.7", turning approximately 702 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

245/40R21 Research Guides

Confirm 245/40R21 fits your vehicle

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