Tire Size Guide

285/30R21 Tires

Compare 6 available models across 2 categories, then confirm fitment for your vehicle.

Our Top Pick in 285/30R21
Continental ContiSportContact 5P - CSI
Ultra High Performance SummerPerformance

The ContiSportContact 5P - CSI is a compelling choice for drivers who demand top-tier dry grip and handling in an ultra-high performance summer tire.

Perfect dry grip and handling scores of 10, surpassing the category average of 8.7, make it a standout for spirited driving. Treadwear warranty of 55,000 miles is significantly higher than the category average of 37,754 miles, offering extended usability. Comfort score matches the category average of 6, ensuring a balanced ride quality for an ultra-high performance tire.
69Spec score (est.)
Full analysis
5 models

Best Ultra High Performance Summer Tires in 285/30R21

All Ultra High Performance Summer tires

The ContiSportContact 5P - CSI is a compelling choice for drivers who demand top-tier dry grip and handling in an ultra-high performance summer tire.

  • Perfect dry grip and handling scores of 10, surpassing the category average of 8.7, make it a standout for spirited driving.
  • Treadwear warranty of 55,000 miles is significantly higher than the category average of 37,754 miles, offering extended usability.

Underwhelming wet grip performance compared to category norms, posing a risk in rainy conditions.

55,000 mi warrantyTreadwear 550
Spec score69estimated
Details

The Michelin Pilot Sport 4S is a standout choice for drivers who prioritize dry and wet grip above all else.

  • Dry grip score of 10 leads the ultra high performance summer category, ideal for spirited driving.
  • Wet grip score of 9 significantly exceeds the category average of 7.6, enhancing safety in wet conditions.

The 30,000-mile treadwear warranty may fall short for drivers who cover extensive distances annually.

30,000 mi warrantyTreadwear 300Traction AA
Spec score69estimated
Details

The Pirelli P Zero PZ4 Sport is an excellent choice for drivers who prioritize dry grip and handling.

  • Top dry grip and handling scores of 10, surpassing the category average of 8.7, making it ideal for spirited driving.
  • Treadwear warranty of 60,000 miles is significantly higher than the category average of 37,754 miles, offering more longevity.

Wet grip performance is below average, making it less suitable for those needing confidence in rainy conditions.

Spec scoreestimated
Details

The Pirelli P Zero NCS is tailored for drivers who demand the highest dry grip and handling performance, scoring a perfect 10 in both areas.

  • Perfect dry grip and handling scores of 10, surpassing the category average of 8.7 — ideal for spirited driving on dry roads.
  • Comfort score matches the category average of 6, ensuring a reasonable ride quality for an ultra-high-performance tire.

Its wet grip score of 5 is well below average, making it a poor choice for those who frequently drive in wet conditions.

Spec scoreestimated
Details
Show 1 more ultra high performance summer option
1 model

Best Winter Tires in 285/30R21

All Winter tires
Michelin Pilot Alpin PA4Performance3PMSF Snow

The Michelin Pilot Alpin PA4 is a solid choice for drivers who prioritize balanced performance in winter conditions.

  • Snow traction score of 8 matches the winter category average, ensuring reliable performance in snowy conditions.
  • 30,000-mile treadwear warranty is a significant advantage over many winter tires that offer no mileage guarantee.

Limited treadlife compared to category averages — not the best choice for high-mileage winter driving.

30,000 mi warrantyTreadwear 300
Spec score51estimated
Details
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Popular Brands in 285/30R21

Size decoded

What 285/30R21 Means

285/30R21 designates a tire 285 mm (11.2") wide with a sidewall 30% as tall as it is wide — about 86 mm (3.4") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 27.7", a circumference of about 87.1", and approximately 727 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

86 mm

Sidewall height

27.7"

Overall diameter

87.1"

Circumference

727

Revs per mile

Of the 6 285/30R21 tire models we track, the most common category is ultra high performance summer (5 models), followed by winter (1) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 285/30R21 mean?
285/30R21 breaks down as follows: 285mm 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 285/30R21 tires?
285/30R21 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 285/30R21 tire?
A 285/30R21 tire has a sidewall height of about 86 mm (3.4") and an overall diameter of roughly 27.7", turning approximately 727 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

285/30R21 Research Guides

Confirm 285/30R21 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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