How to Read Tire Size: A Complete Driver’s Guide

Understanding how to read tire size is essential for making safe, informed decisions about tire replacement and maintenance. On every tire sidewall is a string of numbers and letters, like P215/65R16 95H, and each part has a specific meaning. This guide will help you break down the full code so you can choose the right tires for your vehicle.

Tire Size Example: What P215/65R16 95H Means

Let’s break down the components:

• P = Tire type. "P" stands for Passenger vehicle. You may also see LT (Light Truck) or no letter at all (Euro-metric).

• 215 = Section width in millimeters (sidewall to sidewall).

• 65 = Aspect ratio, or sidewall height as a percentage of width (65% of 215mm).

• R = Construction type (Radial is standard).

• 16 = Wheel diameter in inches.

• 95 = Load index, indicating how much weight the tire can support (95 = 690 kg).

• H = Speed rating, representing the max speed capacity (H = 210 km/h).
  
  

Where to Find Your Tire Size

• Check the tire sidewall (and learn how to use a tire inflator properly) for your current tires

• Look at the driver’s door sticker or owner’s manual

• Ask your mechanic or tire dealer to verify
  
  

Why Tire Size Matters for Safety and Performance

Tire size affects more than just fit—it plays a role in:

• Handling and cornering stability

• Fuel economy

• Braking performance

• Load capacity and towing safety

Incorrect tire size can cause uneven wear, traction loss, or speedometer errors.

Tips for Replacing Your Tires Correctly

Use dependable gear to keep your tire pressure accurate—explore the Woowind Ventus Pro for fast and precise inflation.

• Always match OEM specifications for size, load index, and speed rating

• Replace tires in pairs on the same axle for balance

• Check the DOT date code (e.g., 2523 = 25th week of 2023)—and if you're unsure where to service your tires, here’s where to get air for your tires near you
  

• Balance and align tires during every replacement

• Choose tires that match your driving needs: city, highway, winter, or off-road. Browse our car air pumps for everyday inflation support.

Pro Advice: Selecting Tires for Your Driving Conditions

• Urban commuters: Opt for lower rolling resistance to save fuel

• Off-road drivers: Choose wider, deeper-tread options with reinforced sidewalls

• Long-distance travelers: Look for all-season comfort and load support

• Cold climates: Use winter tires marked with the snowflake symbol (3PMSF)
  
  

Final Checklist: What to Confirm Before Buying New Tires

1. Tire size matches your car’s OEM recommendation

2. Load index and speed rating meet or exceed manufacturer specs

3. Tire is appropriate for seasonal/weather conditions

4. DOT date is within the last 3 years for freshness

5. Installation includes professional balancing and alignment. For versatile inflation, explore our electric air pump collection.

Choosing the right tire isn’t just about size—it’s about matching performance, safety, and usage. When in doubt, consult a certified tire technician. to maintain tire pressure for better efficiency and longevity.