How to Read Tire Sizes: A Simple Guide
- Mariusz Obniski
- Dec 17, 2025
- 2 min read
Tire sizes can look confusing at first. They have letters and numbers that tell you important information about your tire. Knowing how to read tire sizes helps you choose the right tires and stay safe on the road.
What Does a Tire Size Look Like?
A tire size may look like this:P215/65R16
Each part of the tire size has a meaning.
What Does Each Part Mean?
The Letter (P)
The first letter tells you the type of vehicle.
P = Passenger vehicle
LT = Light truck
Most cars use tires that start with P.
The First Number (215)
It tells you how wide the tire is from side to side.
The Second Number (65)
This is the aspect ratio.
It shows how tall the tire sidewall is compared to its width.
A higher number means a taller tire.
The Letter R
The R stands for radial, which is how most tires are built today.
The Last Number (16)
This number is the wheel size in inches.
It tells you what size wheel the tire fits.
Why Tire Size Matters
Using the correct tire size helps:
Keep your car balanced
Improve handling
Prevent tire damage
Keep speed and mileage accurate
Using the wrong tire size can cause safety problems.
Where Can I Find My Tire Size?
You can find the correct tire size in these places:
On the tire sidewall
In your owner’s manual
On the driver-side door placard
Always match the manufacturer’s recommended size.
FAQs About Tire Sizes
1 Can I use a different tire size?
It’s best to use the size recommended by the manufacturer.
2 Do all four tires need to be the same size?
Yes. All tires should be the same size for safe driving.
3 What happens if I choose the wrong tire size?
Your car may handle poorly or wear tires faster.
4 Can a mobile tire service help me choose tires?
Yes. A mobile tire expert can help you pick the correct size.
5 Does tire size affect fuel use?
Yes. The wrong size can lower fuel efficiency.
Want to know more? Click the link below!
Get the Right Tires Brought to You 🚗
Choosing the right tire size keeps your car safe and smooth on the road. If you need new tires, we can bring the correct tires straight to you and install them on-site.
📞 Call now (224) 210-5659 or book online for expert help reading tire sizes and fast, professional tire delivery and installation at your home or location.
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