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- Tire Size Meanings. The numbers and letters on the sidewall can be confusing. Here’s what each one means.
- A: TIRE TYPE. The first letter in the code tells you what class of tire it is. P stands for passenger vehicle tire. P-class tires include cars, SUVs, crossovers, minivans and smaller pickup trucks, as well as EVs (electric vehicles).
- B: TIRE WIDTH. The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head-on) in millimeters. This may also be referred to as the section width.
- C: ASPECT RATIO. The forward slash separates the tire width number from the two-digit aspect ratio. The bigger the aspect ratio, the higher/taller the tire’s sidewall, or “profile” as it’s sometimes called.
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- Tire Numbers & Symbols Explained
- Additional Tire Markings
- Other Tire Specification
- Tire Size Examples & Explanation
- FAQs
- Summary
We all know that the tire size is important and that we need to match the dimensions of the tire to the rim and the vehicle, but there’s a bit more to it than that. Going with the numbers recommended by the manufacturers is fine, but once we start talking about performance, grip, noise, fuel economy, and safety, understanding the meaning behind eac...
The sequence of letters and numbers that form the primary sidewall markings (example: P 155/65R14 75T) are the most important factors to consider when purchasing a new tire. However, you can find a lot more useful information about the tires on the sidewall and manufacturer’s specification sheet, so let’s go through those as well.
Besides looking at the markings on the tire, there are a few more specs to consider if you’re looking for an ideal product. Brand new tires should have a sticker attached to the tread of the tire that provides further information, including: 1. Run flat capability 2. Fuel efficiency grade 3. Rolling noise 4. Wet surface traction 5. Tire Type Run fl...
We’ve got all the markings down, so now let’s see how we can apply them to an actual product. I’ve chosen one SUV tire and a high-performance tire to illustrate the differences between the markings.
What do the 3 different numbers on a tire mean?
The three most important numbers on the tire represent: 1. Tire width 2. Tire height in relation to the width 3. Rim diameter For example, a tire with numbers 185/55R15 has a thread width of 185 millimeters, a height aspect of 55 (101mm), and fits on a rim 15″ in diameter.
How do you read tire numbers?
Tire numbers are read from left to right, with letters or non-number symbols dividing the markings. Markings are usually spaced out, but if they’re all packed together, keep the following in mind: P205/55R1691S 1. Disregard the first letter (P) unless you’re looking for an LT tire. 2. Tire width comes first and it’s always 3 digits (205). 3. After the “/” comes the aspect ratio, which is always 2 digits (55). 4. The “R” can be disregarded as all modern tires are radial unless explicitly said...
Can I use 245 tires instead of 235?
When you swap from the OEM recommended tires without changing the rim, you’re stretching the tire. By going from 235 to 245, the width of the tire will be 10mm greater than necessary, so you’ll get an inverse stretch, where the tire overflows the rim and gives it a “meaty” look. This swap is considered a stage-1 stretch and it’s relatively safe.
There are a lot of markings that can be found on the side of a tire, but if you’ve read through this article, you’ll be able to understand what each of them means and why it’s important. If you want the bare minimum, then pay attention to the width, aspect ratio, rim size, and weather rating as those are the most important factors. However, you sho...
Jun 26, 2022 · We’ll cover the basic tire size specification that includes the basic tire width, sidewall height (aspect ratio), and wheel diameter. We’ll then cover the complete tire size specification that includes less well-known tire size meanings such as load index and speed ratings.
How to read tire size is complicated. Learn how to read tire size, use our tire size converter, or browse our tire size conversion charts.
With a little explanation it's easy to understand what all of the letters and numbers mean on your tire's sidewall. The numbers are indicators of the size, type, and performance of the tire. Enter your information to see the tires that fit your vehicle.
How To Read Your Tires. It may seem like a bunch of random numbers and letters are on your tire sidewall, but they all mean something. These letters and numbers tell you the tire size, type of tire and safety standards. We will teach you how to read your tires below.
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Understanding tire markings is essential for any driver, whether you're driving a compact car, a heavy-duty truck, or the latest electric vehicle. Next time you look at your tires, you’ll know exactly what those numbers and letters mean and how they relate to your vehicle’s performance and safety.
