Decoding Tire Numbers: A Quick Guide to Reading Your Tire’s Code

Alternative Automotive • March 1, 2025

Have you ever looked at your tires and wondered what those numbers mean?

Understanding the numbers on your tires can help you choose the right replacements and maintain your vehicle's performance. Here’s a simple guide to help you decode the information stamped on your tires.

Common Tire Number Format

Consider a typical tire code: 205/55R16 91V. Let’s break it down:

  • 205: This is the tire’s width in millimeters.
  • 55: This is the aspect ratio, which represents the sidewall height as a percentage of the width.
  • R: This stands for radial construction, which is the most common type used in today’s vehicles.
  • 16: This is the rim diameter in inches.
  • 91: This number is the load index, indicating the maximum weight the tire can support.
  • V: This is the speed rating, showing the maximum speed at which the tire can safely operate.
Young lady struggling to read side wall details of a tire.

Why It Matters

Knowing how to read these numbers helps ensure you select the proper tires for your vehicle, which affects safety, fuel efficiency, and overall performance. If you’re ever unsure about your tire’s specifications or need a replacement, our team at Alternative Automotive is here to help.

Get Professional Tire Service

Whether you need new tires, a tire rotation, or a full inspection, we offer expert services to keep your ride safe and efficient.

Tires lined up against a cloudy sky with a bright sunset.

Schedule a service with Alternative Automotive today and let us help you stay on the road with confidence!

Understanding your tire numbers is the first step toward proper vehicle maintenance. Drive safe!

Santa Claus in red car, waving, wearing sunglasses.
By Alternative Automotive December 17, 2025
December driving in Missouri brings frost, road trips, and winter hazards. Get simple tips to keep your car safe, reliable, and road-ready all month long.
The crew at Altenative Automotive
By Alternative Automotive December 2, 2025
As the year winds down and the holiday lights start popping up around Winfield, we can’t help but feel incredibly grateful.
Document titled
By Alternative Automotive November 17, 2025
What does a powertrain warranty really cover? It's less than you think. Find out the truth about your engine, transmission, and drivetrain coverage before you need a repair.
White SUV parked on a leaf-covered path in a forest with autumn foliage.
By Alternative Automotive November 6, 2025
Experience the best of Missouri in fall! Scenic drives, state parks, and colorful foliage—get your car ready for the ultimate autumn adventure.
Car insurance form with a toy car, cash, and a pen on a table.
By Alternative Automotive October 14, 2025
Car insurance is designed to help when the unexpected happens.
A Dummy’s Guide to Jumpstarting Your Car (Without Looking Like One) blog
By Alternative Automotive October 1, 2025
We’ve all been there: you hop in the car, turn the key, and click… nothing. Your battery’s dead. But don’t panic (and definitely don’t call your cousin who “knows cars” but once put diesel in a gas tank). Here’s the simple, funny-but-true guide to jumpstarting your car—so you look like a pro, not a dummy.
Two women in a truck bed, waving foam fingers, cheering at a tailgate party. Red and white theme.
By Alternative Automotive September 17, 2025
Fall in Missouri means one thing—football season.
Road through trees with red and orange autumn foliage. Wet asphalt with fallen leaves.
By Alternative Automotive September 4, 2025
Driving on Missouri’s scenic fall roads? Wet leaves can be as dangerous as black ice—hiding potholes, reducing traction, and even causing car damage. Learn how to stay safe and protect your vehicle this autumn.
Brakes
By Alternative Automotive August 20, 2025
At Alternative Automotive, we’re all about helping you get the most out of your vehicle, and that starts with staying on top of the essentials.
Person's hand wearing an oven mitt on a car steering wheel; orange mitt, black wheel.
By Alternative Automotive August 5, 2025
We know the heat is rough, but car trouble during a heat wave is worse. Swing by Alternative Automotive and we’ll make sure your vehicle is ready to handle this Missouri summer like a pro.
More Posts