What do the three numbers on a tire size mean?

The first number indicates tire width, the second represents the aspect ratio, and the third shows the wheel diameter the tire fits.

What cars use 195/65R15 tires?

Many compact cars and sedans use 195/65R15 tires. Always check your vehicle’s owner’s manual or a tire size chart to confirm the correct fit.

How to Read Tire Size for Your Vehicle

Q: How do I tell what size my car tires are?

Check the sidewall of your tire. You’ll find a combination of numbers and letters such as 205/65R16, which represent the tire width, aspect ratio, construction type, and wheel diameter.

Q: What does 265/70R16 mean?

It means the tire is 265 millimeters wide, has a height equal to 70% of its width, uses radial construction, and fits a 16-inch wheel.

Q: What does 205/65R16 mean on a tire?

It describes a tire that is 205 millimeters wide, has a sidewall height of 65% of the width, uses radial construction, and fits a 16-inch wheel.

Q: Which tire is bigger, 215 or 205?

A 215 tire is wider than a 205 tire. This difference can affect traction, handling, and in some cases fuel efficiency.

November 15, 2025

616 Auto Repair

Understanding your vehicle’s tires might seem tricky at first glance. Numbers and letters on the sidewall can look like a secret code. But knowing how to read tire size is not only useful, it’s essential for safety, performance, and fuel efficiency. At 616 Auto Repair, we’ve helped countless drivers in Grand Rapids, Michigan, choose the right tires. In this guide, we’ll break down everything you need to know in a way that’s easy to follow.

Why Tire Size Matters

Your tires are the only point of contact between your car and the road. Picking the right tire size affects:

Safety: Properly sized tires handle better and stop more reliably.
Fuel Efficiency: The best tire size for fuel efficiency can save you money at the pump.
Performance: Tires designed for your vehicle help maintain smooth steering and handling.
Longevity: Using the correct size reduces uneven wear, prolonging the life of your tires.

At 616 Auto Repair, we know that understanding tire size can prevent costly mistakes and keep your vehicle running efficiently.

Understanding the Numbers and Letters

You might have noticed a string like 265/70R16 on your tire. Here’s how to read it:

First Number (265): This is the tire width in millimeters from sidewall to sidewall.
Second Number (70): This is the aspect ratio, or the tire’s height as a percentage of its width.
Letter (R): This indicates the tire’s construction. “R” stands for radial.
Last Number (16): This tells you the wheel diameter in inches.

So, 265/70R16 means a tire 265 mm wide, with a height 70% of the width, radial construction, and fits a 16-inch wheel. Using a tire size chart can help you quickly compare options and ensure compatibility.

Tire Size Guide for Different Vehicles

Different types of vehicles require different tire considerations. Here’s a quick breakdown:

● Tire Size for SUVs: SUVs often need larger tires for stability and handling. Wider tires improve traction, especially in rough weather or off-road conditions. Always check the recommended tire size for your specific SUV model.

● Tire Size for Trucks: Trucks carry heavier loads, so the tires must support extra weight. Taller and thicker tires are common. Proper truck tire sizing ensures safety while hauling cargo and towing.

● Best Tire Size for Fuel Efficiency: Smaller, lighter tires often increase fuel efficiency by reducing rolling resistance. While performance is important, the best tire size for fuel efficiency balances comfort, safety, and savings.

A tire size guide can help you determine what’s right for your vehicle type and driving habits. Our team at 616 Auto Repair is happy to walk you through this in person, ensuring your tires meet your needs.

Practical Tips for Choosing the Right Tires

Check Your Owner’s Manual: Your car manufacturer lists recommended tire sizes.
Use a Tire Size Chart: Compare dimensions and make sure the new tires fit your wheels.
Consider Driving Conditions: Wet roads, snow, and off-road surfaces all affect the type of tire you need.
Balance Performance and Efficiency: Look for tires that provide both comfort and lower fuel consumption.
Regular Maintenance: Rotate tires and check pressure regularly for safety and longevity.

At 616 Auto Repair, we offer a full range of tire services. From selecting the right tire size to installation, our ASE-certified technicians handle it all. We approach every vehicle with passion and precision, making sure you leave our shop with tires that enhance your driving experience.

Keep Your Vehicle Safe and Efficient!

Understanding tire size may seem complicated at first, but it’s key to safe, efficient driving. Using a tire size guide or consulting our tire shop ensures you pick the perfect fit for your SUV, truck, or car.

616 Auto Repair, a family-owned shop in Grand Rapids, Michigan, is here to help. Our ASE-certified technicians handle everything from tire installation to full vehicle maintenance. More than a repair shop, we focus on enhancing your driving experience.

Contact us today to find the right tire size for your vehicle and enjoy safe, efficient, and smooth rides. Your car deserves the best, and so do you!

Frequently Asked Questions

Q1: How do I tell what size my car tires are?

Look at the sidewall of your tire. You’ll see a combination of numbers and letters, like 205/65R16, which indicate width, aspect ratio, construction, and wheel diameter.

Q2: What does 265 70R16 mean?

It’s a tire 265 mm wide, with a height of 70% of the width, radial construction, and fits a 16-inch wheel.

Q3: What do the 3 numbers on a tire size mean?

The first number is the tire width, the second is the aspect ratio, and the third is the wheel diameter.

Q4: What does 205 65 R16 mean on a tire?

It’s a tire 205 mm wide, height 65% of the width, radial construction, and fits a 16-inch wheel.

Q5: Which tire is bigger, 215 or 205?

A 215 tire is wider than a 205 tire, affecting traction, handling, and sometimes fuel efficiency.

Q6: What cars are 195 65R15 tires?

Many compact cars and sedans use this size, but it’s always best to check your owner’s manual or a tire size chart.

Ricardo Navarrete-Mendez

Ricardo Navarrete-Mendez is the owner of 616 Auto Repair, a trusted full-service automotive repair shop in Grand Rapids, MI, known for professional vehicle maintenance, diagnostics, and repair services. Under Ricardo’s leadership, the team focuses on quality workmanship, transparent service, and customer satisfaction for every car that comes through the garage. His hands-on experience and commitment to excellence have helped build 616 Auto Repair into a reliable choice for local drivers