Installing the right tires on your vehicle is essential to the overall performance and safety of your vehicle. Your tire choice should reflect the conditions in which you drive and your preferences for vehicle response and handling. To make the most informed decision, though, you must understand how to read tire size when it's time to buy tires.
Thankfully, determining the correct tire size for your vehicle is relatively simple. All the information you need is immediately available either in your owner's manual or somewhere on the vehicle itself. Already know how to read tire size numbers? Skip the explanation and find the right Bridgestone tire for your vehicle online or by visiting a Bridgestone tire dealer near you.
While actual, physical measurements like width and diameter are factors in finding the right tire size, there are additional details to consider. Knowing how to read car tire sizes also means understanding terms like load index and speed rating that affect your vehicle's overall capabilities.
No matter what vehicle you drive, finding the manufacturer-recommended tire size should be easy. The best place to start looking is the owner's manual.
Don't worry if you can't locate the manual; you may also find a tire fit guide in these locations:
You can also find tire size data on the sidewall of your current tires (assuming they're the proper size). However, no matter where you find your tire size, you will have to decipher a sequence of numbers and letters. Don't worry if it looks confusing at first — every letter and number has a straightforward meaning. Let's break down how to read car tire size.
Let's take a look at what each number or letter stands for, one by one, in the order they appear in your tire size data. We'll be using this tire size as an example: P225/70R16 91S.
For most vehicles, you'll see the letter "P" before the number sequence begins: P225/70R16 91S. The "P" is short for "P-metric," which is a designation by the Tire and Rim Association for a "passenger car" tire type. A "P" signifies the tire was designed to primarily be used on passenger vehicles, which can include cars, minivans, SUV's and other light-duty pickup trucks.
If you see "LT" instead of "P," it's because you need "light truck" tires – "LT" is short for "LT-metric," which is a designation by the Tire and Rim Association for a "light truck" type tire. Light truck tires are designed to be used on vehicles capable of carrying heavy cargo or pulling trailers.
Similarly, "T" stands for "temporary" and is for your spare tire. If you see "ST," that means "special trailer." A special trailer tire is never installed on the drive or steer wheels. It's only intended for use on trailer axles.
The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P225/70R16 91S.
Tire width always refers to the measurement from one sidewall to another. Thus, a tire with the measurement "P225" is for a passenger vehicle and has a nominal width of 225 millimeters.
After the slash mark, the next number you see is for the tire's aspect ratio, which essentially tells you how tall your tire's profile is: P225/70R16 91S. Aspect ratios are delivered in percentages. Tire makers calculate the aspect ratio by dividing a tire's sidewall height by its width. If a tire has an aspect ratio of 70, it means the tire's height is 70% of its width.
Lower aspect ratio tires, such as a 60 series, generally offer vehicle handling performance advantages over higher aspect ratio tires, such as a 75 series.
After the aspect ratio comes a letter to indicate the tire's construction: P225/70R16 91S. "R" refers to the internal structure of your tire and gives you a general idea of its stability.
There are two types of construction that you may see on the sidewall of a tire
"Bias-ply" tires were used on automobiles and light trucks until the '70s," reports the classic car site, Hemmings.
But radial tires represent the vast majority of tires on the road in the United States today. In fact, you will almost always see the letter "R" on tires as radial tires have been the industry standard for over 40 years. Radial construction means the tire's internal ply cords are oriented in a radial direction (at 90 degrees to the centerline of the tread).
The next number is the wheel’s diameter. For example, a tire with the P225/70R16 91S would fit a rim with a 16-inch diameter.
Take note: if you decide to change your rims' size, you will also need to get new tires that are compatible with the change in size. Tires designed to fit a 16-inch wheel diameter will not stretch to fit on new 18-inch rims.
View Other Common Diameter Sizes:
14-Inch Diameter Tires
15-Inch Diameter Tires
17-Inch Diameter Tires
18-Inch Diameter Tires
19-Inch Diameter Tires
20-Inch Diameter Tires
21-Inch Diameter Tires
22-Inch Diameter Tires
The next figure needed to read tire size numbers is your tire's load index.
The load index tells us how much weight, in pounds, the tire can support when fully inflated: P225/70R16 91S.
It is called the load "index" because the figure doesn't tell us the precise number of pounds the tire can support, at least not by itself. Instead, the number corresponds to a specific load capacity listed in an index. Beginning with one and ending with 150, numbers in the load index represent carrying capacities of 99 to 7385 lbs.
Additionally, you may not find this number present on all tires. This is because the load index is not required by law to be printed on tires. If there is no load index measurement on your tires, check the owner's manual or contact your local Bridgestone tire dealer for more information.
The final figure in a tire size sequence is the speed rating indicated by a letter: P225/70R16 91S. Just as your load index number corresponds to a particular load, your speed rating letter corresponds to a specific speed capability based on a standardized laboratory test.
For example, a tire with a speed rating "S" is rated for up to 112 mph, while a tire rated "R" is up to 106 mph. Remember that this isn't a recommended cruising speed, but rather the maximum speed that tire type can withstand. Of course, you should always follow legal speed limits on roadways.
Here are the most common letters for speed ratings and their corresponding maximum speeds:
Tires with higher speed ratings tend to offer increased handling performance. Replacement tires must have the same or higher speed rating to maintain vehicle speed capability. If a vehicle has tires with different speed ratings, the speed rating of the "slowest" tire dictates the vehicle's top speed.
Like the load index, the speed rating is not required by law to be listed on all tires.
If your tires do not have the speed rating listed, your owner's manual will have the relevant information for your model's stock tire type.
You may find "M+S" or "M/S" after the main tire size sequence on some tires. This indicates that the tire has some capacity to handle snow and mud conditions. This indication is common on most radial or "R" type tires.
You may notice another set of letters and numbers on your tire's sidewall beginning with "DOT." This is not an indication of tire size, but rather that the tire complies with Federal Motor Vehicle Safety Standards. The "DOT" stands for Department of Transportation and is followed by the tire identification number.
The first two letters or numbers after DOT refer to the manufacturing plant where the tire was produced and the last four numbers indicate the week and year the tire was made. The numbers 4318, for instance, indicate that the tire was manufactured during the 43rd week of 2018.
While it's certainly possible to upgrade your tires' size, it's usually best to stick to your manufacturer-recommended tire size for optimal performance. Increasing the size of your tires may give your car more ground clearance, but it may also affect handling, drivetrain performance and fuel economy. Keep in mind the changes to key figures mentioned above, such as load index and speed rating, and how they may affect your vehicle's capabilities if you decide to increase tire size.
Once you know how to read the numbers on tires, you can explore tires by size and narrow down your tire options quickly. Compare tire sizes online or visit a Bridgestone tire dealer near you for help.
The wheels that came installed on your vehicle are designed to perfectly fit your vehicle’s suspension, gearing, and bodywork which can affect ride quality and vehicle performance.
But that doesn’t mean you can’t have different wheels or rims installed on your car or truck. To understand what wheels will work for your vehicle, we’ll take a look at rim sizes and some basic measurements.
There are many reasons you might want to switch out your rims. Maybe you want an extra set of wheels and tires for easy installation every winter, or you’re looking for added performance and handling. You might even be going for a specific look, including sleek and stylish or rugged and cool. Whatever your reason, it’s important to note that getting the wrong wheel setup could cause a vibration, or some rubbing on suspension components or vehicle body parts.
Les Schwab Tip: Before you change the tire sidewall height, tread width, or rim size on your vehicle, talk to the experts first. We’ll help translate the difference in RPM, tire speed, load index, and speed rating and how it will or will not fit with your vehicle’s suspension, gearing, and bodywork.
First, start with the wheel size for your vehicle. You can find that on the sidewall of the tires on your original wheels or the inside frame of the driver’s door. Check out Tire Size Explained (Reading the Sidewall) for more.
The wheel diameter (in inches or millimeters) is the fifth set of numbers and letters. What do rim size numbers mean? This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.
The wheel size also includes its width and offset. The width is the distance from each bead seat (from inside to the outside). The offset determines how the wheel and tire set aligns with the wheel well.
The offset is how far inward or outward the mounting surface is in reference to the center-line of the wheel. The center-line is calculated by simply dividing the wheel into two equal halves. Les Schwab has the tools to accurately measure your center-line.
The offset is how far inward or outward the mounting surface is in reference to the center-line of the wheel.
Here's how offset determines the look of your rims. If the hub mounting surface is in front of the center-line, your rims and tire will be pulled inward. This is called positive offset.
If they are behind the centerline, your rims and tire will stick out from the body of the vehicle. This is negative offset.
Les Schwab Tip: Measuring the offset on your vehicle is difficult without removing the tire and wheel. Consult the pros to get the right fit.
To ensure a set of rims fit properly on your vehicle, you’ll need the hub size on your car or truck as well as the wheel center bore measurement and number of wheel studs (as well as the distance between those studs). Les Schwab has those measurements for your vehicle, including bolt patterns.
Most vehicles come with a 4-, 5-, 6-, or 8-lug pattern.
These bolt patterns, which are specifically spaced, help narrow your wheel or rim choices. While counting the number of bolts on your vehicle is important before buying a set of rims, it’s vital the wheels you choose match the spacing between the wheel studs on your vehicle.
To measure a 4-lug pattern on a set of rims, measure from the center of two holes across from each other. For a 5-lug pattern, measure from the outside of one wheel stud hole and the center of the opposite. And for 6- and 8-lug patterns, measure from the center of one hole to the center of the opposite wheel stud hole. You’ll either need this measurement in inches or millimeters, depending on the wheel manufacturer.
Remember, there’s no need to take these measurements on your own. The pros at Les Schwab do it every day and can ensure you get the right rims for your vehicle.
At Les Schwab, we take pride in our custom wheel expertise. Stop by and ask about new wheels for your vehicle.
We’ll show you all of your options, whether you’re going for a new look, a boost in performance, a new set of wheels for your winter tires, or simply as a replacement of your current set.
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When we buy a wheel assembly, there are no questions about what disk parameters to pay attention to. But when changing tires or choosing new wheels, you need to choose the right size.
If you select discs only by diameter and bolt pattern, then you can buy an unsuitable kit. It either won't work, or will cause serious problems in the future. So, a violation of the size of the disk and tires can provoke:
deterioration in response to driver commands when maneuvering and turning;
reduced sidewall stiffness;
tire deformation;
decrease in wear resistance.
To find out which disc is suitable for the selected set of tires, use the table:
| Tire height | Tire size | Disk size | ||
| Recommended | Min. | Max. | ||
| Over 12" | ||||
| 82 | 125R12 135R12 145R12 155R12 | 3.5 4.0 4.0 4.5 | 3.0 3.5 3.5 4.0 | 4.0 4.5 5.0 5.0 |
| 70 | 145/70R12 155/70R12 | 4.5 4.5 | 4.0 4.0 | 5.0 5.5 |
| Over 13" | ||||
| 82 | 145R13 155R13 165R13 175R13 | 4.0 4.5 4.5 5.0 | 3.5 4.0 4.0 4.5 | 5.0 5.  5 5.5 6.0 |
| 80 | 135/80R13 145/80R13 155/80R13 165/80R13 | 3.5 4.0 4.5 4.5 | 3.5 3.5 4.0 4.0 | 4.5 5.0 5.5 5.5 |
| 70 | 135/70R13 145/70R13 155/70R13 165/70R13 175/70R13 185/70R13 195/70R13 | 4.0 4.5 4.5 5.0 5.0 5.5 6.0 | 3.5 4.0 4.0 4.5 5.0 5.0 5.2 | 4.5 5.0 5.5 6.0 6.0 6.5 7.0 |
| 65 | 155/65R13 165/65R13 175/65R13 | 4.5 5.0 5.0 | 4.0 4.5 5.0 | 5.5 6.0 6.0 |
| 60 | 175/60R13 185/60R13 205/60R13 | 5. 0 5.5 6.0 | 5.0 5.5 5.5 | 6.0 6.5 7, |
| 55 | 195/55R13 | 6.0 | 5.5 | 7.0 |
| Over 14 inches | ||||
| 82 | 145R14 155R14 165R14 175R14 185R14 | 4.0 4.5 4.5 5.0 5.5 | 3.5 4.0 4.0 4.5 4.5 | 5.0 5.0 5.5 6.0 6.0 |
| 80 | 175/80R14 185/80R14 | 5.0 5.0 | 4.5 5.0 | 5.5 6.0 |
| 70 | 165/70R14 175/70R14 185/70R14 195/70R14 205/70R14 | 5. 0 5.0 5.5 6.0 6.0 | 4.5 5.0 5.0 5.5 5.5 | 6.0 6.0 6.5 7.0 7.5 |
| 65 | 155/65R14 165/65R14 175/65R14 185/65R14 195/65R14 | 4.5 5.0 5.0 5.5 6.0 | 4.0 4.5 5.0 5.0 5.5 | 5.5 6.0 6.0 6.5 7.0 |
| 60 | 165/60R14 175/60R14 185/60R14 195/60R14 205/60R14 | 5.0 5.0 5.5 6.0 6.0 | 4.5 5.0 5.0 5.5 5.5 | 6.0 6.0 6.5 7.0 7.5 |
| 55 | 185/55R14 205/55R14 | 6.0 6.5 | 5.0 5.  5 | 6.5 7.5 |
| Over 15" | ||||
| 82 | 125R15 135R15 145R15 155R15 165R15 185R15 | 3.5 4.0 4.0 4.5 4.5 5.5 | 3.0 3.5 3.5 4.0 4.0 4.5 | 4.0 4.5 5.0 5.0 5.5 6.0 |
| 80 | 185/80R15 | 5.5 | 4.5 | 6.0 |
| 70 | 175/70R15 195/70R15 235/70R15 | 5.0 6.0 7.0 | 5.0 5.5 6.5 | 6.0 7.0 8.5 |
| 65 | 185/65R15 195/65R15 205/65R15 215/65R15 225/65R15 | 5. 5 6.0 6.0 6.5 6.5 | 5.0 5.5 5.5 6.0 6.0 | 6.5 7.0 7.5 7.5 8.0 |
| 60 | 195/60R15 205/60R15 215/60R15 225/60R15 | 6.0 6.0 6.5 6.5 | 5.5 5.5 6.0 6.0 | 7.0 7.5 8.0 8.0 |
| 55 | 185/55R15 195/55R15 205/55R15 225/55R15 | 6.0 6.0 6.5 7.0 | 5.0 5.5 5.5 6.0 | 6.5 7.0 7.5 8.0 |
| 50 | 195/50R15 205/50R15 225/50R15 | 6.0 6.5 7.0 | 5.5 5.5 6.0 | 7.0 7.5 8.0 |
| 45 | 195/45R15 | 6. 5 | 6.0 | 7.5 |
| Over 16" | ||||
| 65 | 215/65R16 | 6.5 | 5.5 | 7.5 |
| 60 | 225/60R16 235/60R16 | 6.5 7.0 | 6.0 6.5 | 8.0 8.5 |
| 55 | 205/55R16 225/55R16 245/55R16 | 6.5 7.0 7.5 | 5.5 6.0 7.0 | 7.5 8.0 8.5 |
| 50 | 205/50R16 225/50R16 235/50R16 255/50R16 | 6.5 7.0 7.5 8.0 | 5.5 6.0 6.5 7.0 | 7.5 8.  0 8.5 9.0 |
| 45 | 195/45R16 205/45R16 225/45R16 245/45R16 | 6.5 7.0 7.5 8.0 | 6.0 6.5 7.0 7.5 | 7.5 7.5 8.5 9.0 |
| 40 | 215/40R16 225/40R16 | 7.5 8.0 | 7.0 7.5 | 8.5 9.0 |
| Over 17" | ||||
| 55 | 225/55R17 | 7.0 | 6.0 | 8.0 |
| 50 | 205/50R17 215/50R17 | 6.5 7.0 | 5.5 6.0 | 7.5 7.5 |
| 45 | 215/45R17 225/45R17 235/45R17 245/45R17 255/45R17 | 7. 0 7.5 8.0 8.0 8.5 | 7.0 7.0 7.5 7.5 8.0 | 8.5 8.5 9.0 9.0 9.5 |
| 40 | 215/40R17 235/40R17 245/40R17 255/40R17 265/40R17 275/40R17 285/40R17 | 7.5 8.5 8.5 9.0 9.5 9.5 10.0 | 7.0 8.0 8.0 8.5 9.0 9.0 8.5 | 8.5 9.5 9.5 10.0 10.5 11.0 11.0 |
| 35 | 245/35R17 265/35R17 335/35R17 | 8.5 9.5 11.5 | 8.0 9.0 11.0 | 9.5 10.5 13.0 |
| Over 18" | ||||
| 50 | 235/50R18 | 7. 5 | 6.5 | 8.5 |
| 45 | 255/45R18 | 8.5 | 8.0 | 9.5 |
| 40 | 225/40R18 235/40R18 245/40R18 265/40R18 | 8.0 8.0 8.5 9.5 | 7.5 7.5 8.0 9.0 | 9.0 9.0 9.5 10.5 |
| 35 | 285/35R18 295/35R18 | 10.0 10.5 | 9.5 10.0 | 11.0 11.5 |
| thirty | 325/30R18 | 12.0 | 11.0 | 13.0 |
| Over 20" | ||||
| 40 | 245/40R20 | 9. 0 | 8.0 | 9.5 |
| 35 | 275/35R20 | 10.0 | 9.0 | 11.0 |
A small recommendation. Try to buy tires and wheels in one place. This will reduce the risk of buying products with inappropriate sizes.
Tire and rim size charts
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 12 | 125 R12 | 3. 5 | 3.0 | 4.0 |
| 135 R12 | 4.0 | 3.5 | 4.5 | |
| 145 R12 | 4.0 | 3.5 | 5.0 | |
| 155 R12 | 4.5 | 4.0 | 5.0 | |
| 145/70 R12 | 4.5 | 4.0 | 5.0 | |
| 155/70 R12 | 4.5 | 4.0 | 5.5 | |
| 13 | 145/80 R13 | 3.5 | 4 | 5 |
| 145/70 R13 | 3.5 | 4.5 | 5 | |
| 145/60 R13 | 4 | 4.5 | 5 | |
| 155/80 R13 | 4 | 4.5 | 5 | |
| 155/70 R13 | 4 | 4.5 | 5 | |
| 165/80 R13 | 4 | 4.5 | 5 | |
| 165/70 R13 | 4 | 5 | 5. 5 | |
| 165/65 R13 | 4.5 | 5 | 6 | |
| 175/70 R13 | 4.5 | 5 | 6 | |
| 175/65 R13 | 5 | 5 | 6 | |
| 185/70 R13 | 4.5 | 5.5 | 6 | |
| 14 | 145/65 R14 | 4 | 4.5 | 5 |
| 155/65 R14 | 4.5 | 4.5 | 5.5 | |
| 165/70 R14 | 4 | 5 | 5.5 | |
| 165/65 R14 | 4.5 | 5 | 6 | |
| 165/60 R14 | 4.5 | 5 | 6 | |
| 175/80 R14 | 4.5 | 5 | 6 | |
| 175/70 R14 | 4.5 | 5 | 6 | |
| 175/65 R14 | 5 | 5 | 6 | |
| 175/60 R14 | 5 | 5 | 6 | |
| 185/70 R14 | 4. 5 | 5.5 | 6 | |
| 185/65 R14 | 5 | 5.5 | 6.5 | |
| 185/60 R14 | 5 | 5.5 | 6.5 | |
| 185/55 R14 | 5 | 6 | 6.5 | |
| 195/70 R14 | 5 | 6 | 6.5 | |
| 195/65 R14 | 5.5 | 6 | 7 | |
| 195/60 R14 | 5.5 | 6 | 7 | |
| 15 | 145/65 R15 | 4 | 4.5 | 5 |
| 155/70 R15 | 4 | 4.5 | 5 | |
| 155/65 R15 | 4.5 | 4.5 | 5.5 | |
| 165/65 R15 | 4.5 | 5 | 6 | |
| 175/65 R15 | 5 | 5 | 6 | |
| 175/60 R15 | 5 | 5 | 6 | |
| 175/55 R15 | 5 | 5. 5 | 6 | |
| 185/65 R15 | 5 | 5.5 | 6.5 | |
| 185/60 R15 | 5 | 5.5 | 6.5 | |
| 185/55 R15 | 5 | 6 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 195/65 R15 | 5.5 | 6 | 7 | |
| 195/60 R15 | 5.5 | 6 | 7 | |
| 195/55 R15 | 5.5 | 6 | 7 | |
| 195/50 R15 | 5.5 | 6 | 7 | |
| 195/45 R15 | 6 | 6.5 | 7.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 205/65 R15 | 5.5 | 6 | 7.5 | |
| 205/60 R15 | 5.5 | 6 | 7.5 | |
| 205/55 R15 | 5. 5 | 6.5 | 7.5 | |
| 205/50 R15 | 5.5 | 6.5 | 7.5 | |
| 215/70 R15 | 5.5 | 6.5 | 7 | |
| 215/65 R15 | 6 | 6.5 | 7.5 | |
| 225/60 R15 | 6 | 6.5 | 8 | |
| 225/55 R15 | 6 | 7 | 8 | |
| 225/50 R15 | 6 | 7 | 8 | |
| 16 | 195/60 R16 | 5.5 | 6 | 7 |
| 195/55 R16 | 5.5 | 6 | 7 | |
| 195/50 R16 | 5.5 | 6 | 7 | |
| 195/45 R16 | 6 | 6.5 | 7.5 | |
| 205/60 R16 | 5.5 | 6 | 7.5 | |
| 205/55 R16 | 5.5 | 6.5 | 7. 5 | |
| 205/50 R16 | 5.5 | 6.5 | 7.5 | |
| 205/45 R16 | 6.5 | 7 | 7.5 | |
| 215/65 R16 | 6 | 6.5 | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 215/55 R16 | 6 | 7 | 7.5 | |
| 215/40 R16 | 7 | 7.5 | 8.5 | |
| 225/60 R16 | 6 | 6.5 | 8 | |
| 225/55 R16 | 6 | 7 | 8 | |
| 225/50 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/55 R16 | 7.5 | 8 | 9 | |
| 17 | 205/55 R17 | 5.5 | 6.5 | 7.5 |
| 205/50 R17 | 5. 5 | 6.5 | 7.5 | |
| 205/45 R17 | 6.5 | 7 | 7.5 | |
| 205/40 R17 | 7 | 7.5 | 8 | |
| 215/60 R17 | 6 | 6.5 | 7.5 | |
| 215/55 R17 | 6 | 7 | 7.5 | |
| 215/50 R17 | 6 | 7 | 7.5 | |
| 215/45 R17 | 7 | 7 | 8 | |
| 215/40 R17 | 7 | 7.5 | 8.5 | |
| 225/60 R17 | 6 | 6.5 | 8 | |
| 225/55 R17 | 6 | 7 | 8 | |
| 225/50 R17 | 6 | 7 | 8 | |
| 225/45 R17 | 7 | 7.5 | 8.5 | |
| 225/35 R17 | 7.5 | 8 | 9 | |
| 235/65 R17 | 6. 5 | 7 | 8.5 | |
| 235/55 R17 | 6.5 | 7.5 | 8.5 | |
| 235/50 R17 | 6.5 | 7.5 | 8.5 | |
| 235/45 R17 | 7.5 | 8 | 9 | |
| 235/40 R17 | 8 | 8.5 | 9.5 | |
| 245/55 R17 | 7 | 7.5 | 8.5 | |
| 245/45 R17 | 7.5 | 8 | 9 | |
| 245/40 R17 | 8 | 8.5 | 9.5 | |
| 255/55 R17 | 7 | 8 | 9 | |
| 255/45 R17 | 8 | 8.5 | 9.5 | |
| 255/40 R17 | 8.5 | 9 | 10 | |
| 265/40 R17 | 9 | 9.5 | 10.5 | |
| 275/40 R17 | 9 | 9.5 | 11 | |
| 285/40 R17 | 9. 5 | 10 | 11 | |
| 335/35 R17 | 11 | 12 | 13 | |
| 18 | 205/40 R18 | 7 | 7.5 | 8 |
| 215/45 R18 | 7 | 7 | 8 | |
| 225/60 R18 | 6 | 6.5 | 8 | |
| 225/45 R18 | 7 | 7.5 | 8.5 | |
| 225/40 R18 | 7.5 | 8 | 9 | |
| 225/35 R18 | 7.5 | 8 | 9 | |
| 235/65 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6.5 | 7.5 | 8.5 | |
| 235/45 R18 | 7.5 | 8 | 9 | |
| 235/40 R18 | 8 | 8.5 | 9.5 | |
| 245/50 R18 | 7 | 7.5 | 8. 5 | |
| 245/45 R18 | 7.5 | 8 | 9 | |
| 245/40 R18 | 8 | 8.5 | 9.5 | |
| 245/35 R18 | 8 | 8.5 | 9.5 | |
| 255/45 R18 | 8 | 8.5 | 9.5 | |
| 255/40 R18 | 8.5 | 9 | 10 | |
| 255/35 R18 | 8.5 | 9 | 10 | |
| 265/40 R18 | 9 | 9.5 | 10.5 | |
| 265/35 R18 | 9 | 9.5 | 10.5 | |
| 275/45 R18 | 8.5 | 9 | 10.5 | |
| 275/40 R18 | 9 | 9.5 | 11 | |
| 275/35 R18 | 9 | 9.5 | 11 | |
| 285/40 R18 | 9.5 | 10 | 11 | |
| 285/35 R18 | 9. 5 | 10 | 11 | |
| 285/30 R18 | 10 | 10 | 10.5 | |
| 295/35 R18 | 10 | 10.5 | 11.5 | |
| 295/30 R18 | 10.5 | 10.5 | 11 | |
| 315/30 R18 | 11 | 11 | 12.5 | |
| 335/30 R18 | 12 | 12 | 12.5 | |
| 345/35 R18 | 11.5 | 12 | 13.5 | |
| 345/30 R18 | 12 | 12 | 12.5 | |
| 19 | 225/40 R19 | 7.5 | 8 | 9 |
| 225/35 R19 | 7.5 | 8 | 9 | |
| 235/35 R19 | 8 | 8.5 | 9.5 | |
| 245/45 R19 | 7.5 | 8 | 9 | |
| 245/40 R19 | 8 | 8. 5 | 9.5 | |
| 245/35 R19 | 8 | 8.5 | 9.5 | |
| 255/40 R19 | 8.5 | 9 | 10 | |
| 255/35 R19 | 8.5 | 9 | 10 | |
| 255/30 R19 | 8.5 | 9 | 9.5 | |
| 265/35 R19 | 9 | 9.5 | 10.5 | |
| 265/30 R19 | 9 | 9.5 | 10 | |
| 275/50 R19 | 7.5 | 8.5 | 9.5 | |
| 275/40 R19 | 9 | 9.5 | 11 | |
| 275/35 R19 | 9 | 9.5 | 11 | |
| 275/30 R19 | 9 | 9.5 | 10 | |
| 285/35 R19 | 9.5 | 10 | 11 | |
| 295/30 R19 | 10.5 | 10.5 | 11 | |
| 305/30 R19 | 11 | 11 | 12 | |
| 315/25 R19 | 11 | 11. 5 | 12 | |
| 325/30 R19 | 11 | 11.5 | 12 | |
| 345/30 R19 | 12 | 12 | 12.5 | |
| 20 | 235/30 R20 | 8.5 | ||
| 245/40 R20 | 8 | 8.5 | 9.5 | |
| 245/35 R20 | 8 | 8.5 | 9.5 | |
| 245/30 R20 | 8 | 8.5 | 9 | |
| 255/35 R20 | 8.5 | 9 | 10 | |
| 255/30 R20 | 8.5 | 9 | 9.5 | |
| 275/45 R20 | 8.5 | 9 | 10.5 | |
| 275/35 R20 | 9 | 9.5 | 11 | |
| 285/30 R20 | 10 | 10 | 10.5 | |
| 285/25 R20 | 10.5 | |||
| 295/25 R20 | 10. 5 | 10.5 | 11 | |
| 305/35 R20 | 10 | 11 | 12 | |
| 305/25 R20 | 10.5 | 11 | 11.5 | |
| 325/25 R20 | 11.5 | 12 | 12.5 | |
| 335/30 R20 | 12 | 12 | 12.5 | |
| 21 | 245/35 R21 | 8 | 8.5 | 9.5 |
| 255/30 R21 | 9 | 9 | 9.5 | |
| 285/30 R21 | 10 | 10 | 10.5 | |
| 295/25 R21 | 10 | 10.5 | 11 | |
| 22 | 255/30 R22 | 8.5 | 9 | 9.5 |
| 295/25 R22 | 10.5 | 10.5 | 11 | |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 15 | 185/65 R15 | 5 | 5.5 | 6.5 |
| 195/80 R15 | 5 | 5.5 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 215/80 R15 | 5.5 | 6 | 7 | |
| 225/75 R15 | 6 | 6 | 7.5 | |
| 235/75 R15 | 6 | 6.5 | 8 | |
| 255/75 R15 | 6.5 | 7 | 8.5 | |
| 265/70 R15 | 7 | 8 | 9 | |
| 16 | 205/80 R16 | 5 | 5.5 | 7 |
| 215/70 R16 | 5. | 6.5 | 7 | |
| 215/65 R16 | 6 | 6.5 | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 225/75 R16 | 6 | 6 | 7.5 | |
| 225/70 R16 | 6 | 6.5 | 7.5 | |
| 235/85 R16 | 6 | 6.5 | 7.5 | |
| 235/70 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/70 R16 | 6.5 | 7 | 8 | |
| 255/70 R16 | 6.5 | 7.5 | 8.5 | |
| 255/65 R16 | 7 | 7.5 | 9 | |
| 265/70 R16 | 7 | 8 | 9 | |
| 275/70 R16 | 7 | 8 | 9 | |
| 17 | 225/65 R17 | 6 | 6. | 8 |
| 225/55 R17 | 6 | 7 | 8 | |
| 235/65 R17 | 6.5 | 7 | 8.5 | |
| 235/55 R17 | 6.5 | 7.5 | 8.5 | |
| 245/65 R17 | 7 | 7 | 8.5 | |
| 255/60 R17 | 7 | 7.5 | 9 | |
| 255/50 R17 | 7 | 8 | 9 | |
| 265/65 R17 | 7.5 | 8 | 9.5 | |
| 265/70 R17 | 7 | 8 | 9 | |
| 275/65 R17 | 7.5 | 8 | 9.5 | |
| 275/55 R17 | 7.5 | 8.5 | 9.5 | |
| 18 | 225/55 R18 | 6 | 7 | 8 |
| 235/60 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6. | 7.5 | 8.5 | |
| 255/60 R18 | 7 | 7.5 | 9 | |
| 255/55 R18 | 7 | 8 | 9 | |
| 255/45 R18 | 8 | 8.5 | 9.5 | |
| 265/60 R18 | 7.5 | 8 | 9.5 | |
| 285/50 R18 | 8 | 9 | 10 | |
| 19 | 255/55 R19 | 7 | 8 | 9 |
| 255/50 R19 | 7 | 8 | 9 | |
| 275/45 R19 | 8.5 | 9 | 10.5 | |
| 285/45 R19 | 9 | 9.5 | 10.5 | |
| 20 | 255/50 R20 | 7 | 8 | 9 |
| 275/50 R20 | 7.5 | 8.5 | 9.5 | |
| 275/40 R20 | 9 | 9. | 11 | |
| 295/40 R20 | 10 | 10.5 | 11.5 | |
| 315/35 R20 | 10.5 | 11 | 12.5 | |
| 21 | 295/35 R21 | 10 | 10.5 | 11.5 |
| 22 | 285/35 R22 | 9.5 | 10 | 11 |
| 295/30 R22 | 10 | 10.5 | 11 | |
| 23 | 315/25 R23 | 11 | 11.5 | 12 |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 13 | 155/80 R13 | 4 | 4. | 5 |
| 165/70 R13 | 4.5 | 5 | 5 | |
| 14 | 165/70 R14 | 4.5 | 5 | 5 |
| 165/75 R14 | 4 | 4.5 | 5 | |
| 175/65 R14 | 5 | 5 | 5.5 | |
| 175/75 R14 | 4.5 | 5 | 5.5 | |
| 185/75 R14 | 4.5 | 5 | 6 | |
| 185/80 R14 | 4.5 | 5 | 6 | |
| 195/75 R14 | 5 | 5.5 | 6 | |
| 195/80 R14 | 5 | 5.5 | 6 | |
| 205/75 R14 | 5 | 5.5 | 6.5 | |
| 15 | 185/80 R15 | 4.5 | 5 | 6 |
| 195/70 R15 | 5.5 | 6 | 6 | |
| 205/65 R15 | 5. | 6 | 6.5 | |
| 205/70 R15 | 5.5 | 6 | 6.5 | |
| 215/65 R15 | 6 | 6.5 | 7 | |
| 215/70 R15 | 6 | 6.5 | 7 | |
| 225/70 R15 | 6 | 6.5 | 7 | |
| 16 | 6.5/100 R16 | 4.5 | 4.5 | 6 |
| 175/75 R16 | 4.5 | 5 | 5.5 | |
| 175/80 R16 | 4.5 | 5 | 5.5 | |
| 185/75 R16 | 4.5 | 5 | 6 | |
| 195/60 R16 | 5.5 | 6 | 6.5 | |
| 195/65 R16 | 5.5 | 6 | 6 | |
| 195/75 R16 | 5 | 5.5 | 6 | |
| 205/65 R16 | 5.5 | 6 | 6. | |
