Tire Size Guide

305/35R21 Tires

Compare 5 available models across 2 categories, then confirm fitment for your vehicle.

Our Top Pick in 305/35R21
Michelin Pilot Alpin 5 SUV
WinterSafety

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. Handling and dry grip both score 7.5, above the category average for dry grip, making it versatile for varied winter conditions.
54Spec score (est.)
Full analysis
3 models

Best Winter Tires in 305/35R21

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 warranty
Spec score54estimated
Details

The Pirelli Scorpion Winter is a solid choice for those who prioritize dry grip and treadlife in a winter tire.

  • 60,000-mile treadwear warranty exceeds the winter category average of 54,431 miles, offering longer usage before replacement.
  • Snow traction score of 8 matches the category average, ensuring reliable performance in typical winter conditions.

Lack of ice traction data may be a concern for those facing frequent icy conditions.

Spec scoreestimated
Details

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
2 models

Best Ultra High Performance Summer Tires in 305/35R21

All Ultra High Performance Summer tires

The P Zero PZ4 Luxury NCS is a strong 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, offering precise and responsive control, which is critical for high-performance driving.

The wet grip score of 5 is a major drawback for those who frequently drive in rainy conditions.

Spec scoreestimated
Details

The Pirelli P Zero PZ4 Luxury is tailored for drivers who prioritize dry grip and handling, with scores of 9 in both categories, surpassing the category average for dry grip.

  • Dry grip score of 9 exceeds the category average of 8.7, making it a strong performer in dry conditions.
  • Handling score of 9 keeps it competitive for responsive driving, aligning with its ultra-high-performance designation.

Its wet grip performance lags behind the category average, which could be a dealbreaker for those frequently driving in wet conditions.

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Popular Brands in 305/35R21

Size decoded

What 305/35R21 Means

305/35R21 designates a tire 305 mm (12.0") wide with a sidewall 35% as tall as it is wide — about 107 mm (4.2") — mounted on a 21-inch wheel. That works out to an overall diameter of roughly 29.4", a circumference of about 92.4", and approximately 686 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

107 mm

Sidewall height

29.4"

Overall diameter

92.4"

Circumference

686

Revs per mile

Of the 5 305/35R21 tire models we track, the most common category is winter (3 models), followed by ultra high performance summer (2) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 305/35R21 mean?
305/35R21 breaks down as follows: 305mm is the tire's section width (the widest point), 35 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 305/35R21 tires?
305/35R21 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 305/35R21 tire?
A 305/35R21 tire has a sidewall height of about 107 mm (4.2") and an overall diameter of roughly 29.4", turning approximately 686 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

305/35R21 Research Guides

Confirm 305/35R21 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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