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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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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.
Nikolaev bicycle shop "Sportek"
Published: 04/07/2017
Edited: 07/15/2018
From time to time the question arises: “What is the diameter of the bicycle wheels?”
Most often, it pops up if a tire has broken through or new tires are needed for the wheel of an old bicycle. And to the seller’s question “What wheel does your bike have?” Only one answer comes to mind: “round”.
First of all, you need to define the concept of wheel diameter .
For most ordinary people, this is the diameter of the wheel at the outer (outer) border of the tire.
But there is also the concept of rim fit size - this is the diameter of the rim or tire itself along the inner border.
Therefore, it would be a good idea to first understand the tire marking systems adopted in the world in order to speak the same language with the bike shop salesperson. You can read about this in the article "Bicycle tires: sizes, marking types and interchangeability" on our website.
For the sake of brevity, here is a figure explaining what is measured in each labeling system. Therefore, it is important to understand what we measure and what we want to find.
When choosing a new rubber, be guided by it. If there is no tire with exactly the same marking, look at the interchangeability table and select the right size in another marking.
If a new tire is needed a little wider or narrower, check the tire and rim width chart.
If in doubt, talk to the salesperson. He will tell you if it is right for you, both in terms of size, tread, riding style and what kind of roads you want to ride.
This can be done by measuring the radius and multiplying it by two.
For younger students reading this article, I remind you that one diameter consists of two radii.
Only you need to measure strictly from the center of the sleeve, and not from its edges. When measuring, the bike should stand vertically, and the tape measure, putting one end to the ground, keep the same strictly vertically, and not along the spokes of the wheel . Only such a measurement will give the correct value.
The wheel diameter itself can be measured in the same way. The main thing is to accurately determine its upper cut. To do this, you can take a level and attach it to the top of the tire, and, holding it strictly horizontally, determine the desired size from the tape measure.
After that, we convert it from mm to inches. To do this, divide it by 25.4 (1 inch = 25.4 mm) and calculate the size in inches. The result can be rounded up to standard inch wheel sizes.
For example, if the measurement is 720 mm, divide by 25.4 to get 28.346 inches. So, most likely, the actual size of the wheel, taking into account the accuracy of the calculations, is 28”.
In principle, the rim diameter can also be measured in the same way.
Just pay attention to the difference between what is measured on the outside of the tape measure and the fit size of the rim.
And knowing it, it is easy to calculate the diameter. To do this, the circumference in millimeters must be divided by the number "Pi" (3.14). Once you get the diameter in mm, divide it by 25.4 to get the diameter in inches. Similarly to the previous paragraph, the result will have to be rounded to the nearest whole number in inches. The more accurate all measurements, the more accurate the result and the less rounding.
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What types of markings and interchangeability of bicycle tires. How to choose the size of a bicycle tire. What types of markings and interchangeability of bicycle tires. https://www.sportek.in.ua Nikolaev bicycle shop "Sportek"
Published: 01/27/2017
Edited: 06/01/2021
Sooner or later, almost every cyclist faces the question of replacing the rubber on the wheel or the cameras for them.
The easiest way, of course, is to look at the size of the tire currently installed on the bike (it is written on the side of it), and look for exactly the same. On some rims, their landing diameter and width are also written.
In life, everything is always a little more complicated and it often happens that the tire you like has a marking that is not entirely clear or does not match the marking on your rubber. Sometimes it is necessary to replace the old bicycle rubber, which has served for many years, with a more modern one.
What to do? You can’t put a tire on a bike over the Internet, but you don’t want to pay money just like that.
In this article, we will try to help you understand the markings on bicycle tires and find out which of them are interchangeable.
The first thing to know when choosing a tire is the wheel size. They are usually measured in inches, but sometimes in mm. There are not very many of them and the most common are 16, 18, 20, 24, 26, 27.5, 28, 29.
At the same time:
Further, what else you need to know is the seat size (diameter) of the rim or BSD (eng. Bead Seat Diameter). It is the most important and determines the interchangeability of tires. If this number matches at the rim, tire, or tube, then that tire or tube fits those rims. And if the width of the new rubber can be changed, then the landing size will not change much.
If the size (numbers in mm) is written on the wheel (rim), for example, as in the photos above, they accurately indicate the fit size of the rim and its width, which is the main data for selecting the inner tube and tire for the wheel.
There are several types. The confusion in the designation of sizes began in the middle of the 20th century, and today Great Britain and France use their own designations for marking.
Previously, the sizing system was based on the outside diameter of the tires. It was measured in inches (24", 26", 28") or in millimeters (500, 650, 700, etc.
).
Over time, this system lost its meaning, because different products with the same outer diameter wheels (together with the height of the tire) did not match the inner diameter (rim diameter) on which this tire was put on.There were also marketing moves of manufacturers, and the accuracy of translation and rounding of measurements in inches is lower than in millimeters.0003
To overcome these confusions and bring all sizes to the same standard, the International Organization for Standardization (ISO - International Organization for Standardization) has developed a universal system for designating tire sizes - ISO 5775 . This system was previously known as " ETRTO ". It was proposed by the organization of the same name: ETRTO (European Tire and Rim Technical Organization or in Russian: "European technical organization for rims and tires").
Describes in millimeters all the necessary dimensions. For example, 28-622, where 28 mm is its width and 622 mm is inner (landing) diameter . 
In our country, it is less common, however, on wheels made in Europe or for Europe, it is often applied. At first it was in the form of a number and a letter, for example, 700C - 700 the outer diameter of the tire is in mm. The letter determined the width from "A" - the narrowest to "D" - the widest.
Now the marking has acquired a more modern look. For example: 700 x 35C. Here the outer diameter of the tire is 700 mm and its width is 35 mm. The letter at the end indicates the inner (landing) diameter. In this case, "C" is 622 mm.
Pay attention to a very important nuance and paradox in the sizes indicated in inches.
Tire sizes can be specified as a decimal fraction, such as 26x1.75, or as a simple fraction, such as 26x1 3/4.
Mathematically, these fractions are equal: 1.75 = 1 3/4.
But, in terms of fit size and tire width in millimeters, this is not always the case, and the most unpleasant thing is that tires with such dimensions can be not interchangeable with .
And this circumstance should always be taken into account when purchasing a new bicycle tire.
In the table below, we tried to collect the most common tire size designations in different systems and show their compatibility.
Perhaps not all dimensions encountered in life were taken into account, but if you have a tire with dimensions not listed in the table, try to estimate its dimensions based on similar nearest or similar dimensions.
| Rim bore size in mm according to ISO | Tire size in plain and decimal inches | French tire size | Tire size in mm according to ISO (width - bore) | Explanations |
| 681 | 22-681 | Sports track bike B-64 "Record" KhVZ (1958) | ||
| 642 | 28 x 1 5/8 x 1 1/2 | 700-28A | 28-642 | Obsolete size |
| 28 x 1 3/8 | 700-35A | 37-642 | ||
| 635 | 28 x 1 1/2 x 1 1/8 | 700-28B | 32-635 | American, English, Danish, Chinese, Indian Road Models |
| 28 x 1 1/2, 28 x 1 1/2 x 1 5/8 | 700-38B, 700B Standard | 40-635 | ||
| 28 x 1 5/8 x 1 1/2 | 44-635 | |||
| 630 | 27 x 7/8 | 22-630 | Road bikes, including older models | |
| 27 x 1 | 25-630 | |||
| 27 x 1 1/8 | 28-630 | |||
| 27 x 1 1/4 | 32-630 | |||
| 27 x 1 3/8 | 37-630 | |||
| 27 x all options | ||||
| 622 | 29 x all variants | 700C | This size was invented by marketers for tires with a bore diameter of 622 mm. They differ from 28 only in tire height. | |
| 28 x decimal | 700C | For 622 mm tires | ||
| 28 x 3/4 | 700-18C 700x18C | 18-622 | ||
| 700-19C 700x19C | 19-622 | |||
| 28 x 3/4 | 700-20C 700x20C | 20-622 | ||
| 28 x 1 28 x 7/8 | 700-23C 700x23C | 23-622 | ||
| 28 x 1 | 700-25C 700x25C | 25-622 | ||
| 28 x 1 1/8, 28 x 1 5/8 x 1 1/8 | 700-28C 700x28C | 28-622 | ||
| 28 x 1.20 | 700-30C 700x30C | 30-622 | ||
| 28 x 1 3/4, 28 x 1.5 | 700x38C 700-40C | 40-622 | Road bikes: "Ukraine", "Minsk", "Sura", "Velta", "Aist" (111-321, 111-322) | |
| 28 x 1 1/2, 28 x 1 5/8 x 1 3/8 | 700C 700x35C 700x38C | 35-622 | Road bikes: "Ukraine", "Minsk", "Sura", "Velta", "Aist" | |
| 27 x 1 1/4, 28 x 1 5/8 x 1 1/4 | 700-32C 700x32C | 32-622 | Road and sports touring bikes, "Tourist", "Sport", "Sputnik" | |
| 28 x 1 5/8 x 1 1/4 | Obsolete Canadian designation F13 | |||
28 x 1. 4 | 700-35C 700x35C | 35-622 | Road bikes | |
| 28 x 1.5 | 700x38C 700-38C 700-40C 700x40C | 40-622 | ||
| 28 x 1 3/8 x 1 5/8 | 37-622 | |||
| 28 x 1.6 | 700-42C 700x42C | 42-622 | ||
| 28 x 1.6 | 700-44C 700x44C | 44-622 | ||
| 28 x 1 5/8 x 1 3/4 | 700-45C 700x46C | 45-622 | ||
| 28 x 1.75, 28 x 1 5/8 x 1 3/4 | 700-47C 700x47C | 47-622 | ||
| 28 x 2.00 | 700-50C 700x50C | 50-622 | ||
| 600 | 22 (23, 24, 25, 27, 28, 30)-600 | Old Soviet sports and track bikes | ||
| 599 | 26 x 1.25, 26 x 1.375 | 32-599 | Very old American light bicycles. | |
| 26 x 1 7/8 | 47-599 | ZiF (Penza) 190-535 "Samson" | ||
| 597 | 26 x 1 1/4 (EA1) (England) | 32-597 | English old sports and club bikes. | |
| 26 x 1 3/8 (S-6) | 37-597 | Light bicycles of the American firm Schwinn. | ||
| 590 | 26 x 1 1/8 | 28-590 | Soviet bicycles ZiF (Penza) "Diana", "Prima", "Turn", "Relay", "Sura", "Breeze", "Temp" American and English 3 and 10 speed. | |
| 26 x 1 1/4 | 32-590 | |||
| 26 x 1 3/8 (E.A.3) (England) | 650A | 35-590 | ||
| 26 x 1 3/8 | 650-35A 650x35A | 37-590 | ||
| 26 x 1 5/8 | 44-590 | |||
| 587 | 700D | Old size on some GT models | ||
| 584 | 27. 5 x 1.50 | 650x38B | 40-584 | French road bikes, touring bikes with cargo, tandems, some Raleigh (USA), old Schwinn mountain bikes |
| 26 x 1 1/2 | 650B | 37-584 | ||
| 27.5 x 1.5 | 40-584 | |||
| 27.5 x 1.65 | 44-584 | |||
| 27.5 x 1.75 | 47-584 | |||
| 27.5 x 2 | 52-584 | |||
| 27.5 x 2.1 | 54-584 | |||
| 27.5 x 2.25 | 57-584 | |||
| 27.5 x 2.3 | 60-584 | |||
| 27.5 x 2.4 | 62-584 | |||
| 27.5 x 2.8 | 70-584 | |||
| 571 | 26 x 3/4 | 650x20C | 20-571 | Triathlon, time trial, small road bikes, some French Peugeot bikes. |
| 26 x 7/8 | 650x23C | 23-571 | ||
| 26 x 1 | 650C | 23-571 | ||
26 x 1. 75 | 47-571 | |||
| 26x1 3/4 (S-7) | Road Schwinn | |||
| 559 | 26 x 1.0 | 25-559 | Most mountain bikes. Classic landing diameter for 26 wheels. | |
| 26 x 1.25 | 32-559 | |||
| 26 x 1.35 | 35-559 | |||
| 26 x 1.4 | 37-559 | |||
| 26 x 1.5 | 40-559 | |||
| 26 x 1.6 | 44-559 | |||
| 26 x 1.75 26 x 1.75 x 2 | 47-559 | |||
| 26 x 1.95 | 50-559 | |||
| 26 x 2.00 | 52-559 | |||
| 26 x 2.10 | 54-559 | |||
| 26 x 2.15 | 55-559 | |||
26 x 2. 25 | 57-559 | |||
| 26 x 2.3 | 60-559 | |||
| 26 x 2.4 | 62-559 | |||
| 26 x 3.0 | 75-559 | |||
| 26 x 3.7 | 95-559 | |||
| 26 x 4.00 | 100-559 | |||
| 26 x 4.5 | 115-559 | |||
| 26 x 4.8 | 120-559 | |||
| 547 | 24x1 1/4 | English children's and American firm Schwinn | ||
| 24x1 3/8 (S-5) | Schwinn American children's bicycles | |||
| 540 | 24 x 1 1/8 | 600A | 28-540 | Children's English and European bicycles, most wheelchairs |
| 24 x 1 1/4 | 32-540 | |||
| 24 x 1 3/8(E-5), 24 x 1 3/8 A | 37-540 | |||
| 533 | 24 x 1 1/2 | 37-533 | "Salute", "Altair", "Ervi", "Eaglet", "Erelyukas", "Swallow" ("Kregzdute", "Kregzhdute" - Siauliai bicycle factory "Vairas" Lithuania). Be careful when replacing as not all 24" tires will fit 533 wheels. | |
| 531 | 24 x 1 5/8 x 1 1/2 | 44-531 | ||
| 520 | 24x1 | 25-520 | Road wheels for children's bikes | |
| 507 | 24 x 1.5 | 40-507 | Children's mountain. "Salute", "Altair", "Ervi" | |
| 24 x 1.75 | 47-507 | |||
| 24 x 1.95 | 50-507 | |||
| 24 x 2.0 | 51-507 | |||
| 24 x 2.125 | 54-507 | |||
| 24 x 2.25 | 57-507 | |||
| 24 x 2.35 | 60-507 | |||
24 x 2. 5 | 62-507 | |||
| 24 x 2.6 | 65-507 | |||
| 24 x 2.75 | 70-507 | |||
| 24 x 3.0 | 75-507 | |||
| 501 | 22 x 1.0 | 25-501 | European bikes | |
| 22 x 1 1/4 | 32-501 | |||
| 22 x 1 3/8 | 37-501 | |||
| 490 | 550-28A | 28-490 | European Road Kids Bikes | |
| 22 x 1 3/8 x 1 1/4 | 550-32A | 32-490 | ||
| 22 x 1 3/8 | 550-35A | 37-490 | ||
| 489 | 22 x 1.0 | 25-489 | European bikes | |
| 22 x 1 3/8 | 37-489 | |||
| 22 x 1 3/8 x 1 1/4 | 40-489 | |||
22 x 2. 00 | 50-489 | |||
| 457 | 22 x 1.75 to 2.125 | Children's bicycles | ||
| 451 | 20 x 1 1/8 | 28-451 | BMX for light riders, light children's bikes, some ligerades. Wheels on some types of wheelchairs. | |
| 20 x 1 1/4 | 30-451 | |||
| 20 x 1 3/8 | 37-451 | |||
| 445 | 20 x 1 1/4 | 30-445 | "Schoolboy" (old Soviet models) | |
| 440 | 500-28A | 28-440 | European folding, children's bicycles | |
| 500-35A | 37-440 | |||
| 20 x 1 1/2 | 500-38A | 40-440 | ||
| 438 | 20 x 1 3/8 | 37-438 | European bikes | |
| 20 x 1 3/8 1 1/2 | 40-438 | |||
| 432 | 20 x 2 1/2 | 40-432 | European bikes | |
| 428 | 20 x 2. 00 | 54-428 | European bikes | |
| 419 | 20 x 1 3/4 | Schwinn American children's bicycles | ||
| 406 | 20 x 1.25 | 32-406 | Most BMX bikes, kids and folding models. "Venta" (folding model 175-811). "Stork" (folding, model 113-322) "Tisa-2", "Cross", "KAMA", "DESNA", "Schoolnik", "Velta Kama", "Dubisa" (Siauliai bicycle factory), "Eureka" and other folding and old Soviet models. Folding "Mustang" | |
| 20 x 1.35 | 35-406 | |||
| 20 x 1 3/4 20 x 1.5 | 40-406 | |||
| 20 x 1.75, 20 x 1.75 x 2 | 47-406 | |||
| 20 x 1.95 | 50-406 | |||
| 20 x 2.00 | 54-406 | |||
20 x 2. 125 | 57-406 | |||
| 20 x 2.35 | 60-406 | |||
| 20 x 2.5 | 62-406 | |||
| 20 x 2.6 | 65-406 | |||
| 20 x 2.75 | 70-406 | |||
| 20 x 3.0 | 75-406 | |||
| 390 | 18 x 1 1/8 | 450-28A | 28-390 | Children's European bikes |
| 18 x 1 3/8 | 450-35A | 37-390 | ||
| 450-55A | 55-390 | |||
| 387 | 18 x 1 1/2 | 37-387 | Children's European bikes | |
| 369 | 17 x 1 1/4 | 32-369 | Bicycles Alex Moulton | |
| 355 | 18 x 1 1/8 | 28-355 | Children's bicycles | |
18 x 1. 25 | 32-355 | |||
| 18 x 1.35 | 35-355 | |||
| 18 x 1.5 | 40-355 | Birdy folding bikes. | ||
| 18 x 1.6 | 42-355 | Children's bicycles | ||
| 18 x 1.75 | 47-355 | |||
| 18 x 1.95 | 50-355 | |||
| 18 x 2.0 | 54-355 | |||
| 18 x 2.125 | 57-355 | |||
| 349 | 16 x 1 1/8 | 28-349 | Old Moulton, Brompton and other folding bicycles, ligerade front wheels, children's bicycles. | |
| 16 x 1 1/4 16 x 1.25 | 32-349 | |||
| 16 x 1.35 | 35-349 | |||
| 16 x 1 3/8 | 37-349 | |||
| 340 | 400-30A | 28-340 | Children's European bicycles | |
| 16 x 1 3/8 x 1 1/4 | 400-32A | 32-340 | ||
| 16 x 1 3/8 | 400-35A | 37-340 | ||
| 16 x 1 5/8 | 400A | 44-340 | ||
| 335 | 16 x 1 3/8 | Children's Polish bicycles | ||
| 330 | 16 x 1 1/2 | 400-38B | 40-330 | Children's bicycles |
| 317 | 16 x 1 3/4 | Schwinn American children's bicycles | ||
| 305 | 16 x 1. 5 | 40-305 | Children's bicycles, folding, touring and some ligerades. | |
| 16 x 1.75 | 47-305 | |||
| 16 x 1.95 | 50-305 | |||
| 16 x 2.0 | 54-305 | |||
| 16 x 2.125 | 57-305 | |||
| 16 x 2.5 | 62-305 | |||
| 298 | 14 x 1 1/4 | 350-32A | 32-298 | Carriages, children's bikes, balance bikes |
| 288 | 14 x 1 3/8 | 350A, 350-35A | 37-288 | Children's bicycles, balance bikes |
| 14 x 1 5/8 | 350-38A | 40-288 | ||
| 14 x 1 5/8 x 1 3/8 | 350-42A | 44-288 | ||
| 14 x 1.75 | 47-288 | |||
| 279 | 14 x 1 1/2 | 350-38B | 40-279 | Children's bicycles, balance bikes |
| 254 | 14 x 1. 5 | 40-254 | Children's bicycles, balance bikes | |
| 14 x 1.75 | 47-254 | |||
| 14 x 2 | 54-254 | |||
| 239 | 12 1/2 x 1 3/8 x 1 1/4 | 300-32A 300x32A | 32-239 | Children's bicycles, balance bikes |
| 205 | 12 1/2 x 2 1/4 | 56-205 | Children's bicycles "KVD", balance bikes, sometimes suitable for baby carriages ("Dutik" tires) | |
| 203 | 12 x 1.75 12 1/2 x 1.75 12 1/2 x 1.9 | 47-203 | Small children's bicycles, balance bikes, baby carriages | |
| 12 x 1.95 | 54-203 | |||
| 12 x 2.0 | 50-203 | |||
| 12 x 2.125, 12 1/2 x 2 1/4 R | 57-203 | |||
| 12 1/2 x 2 1/4 | 62-203 | |||
| 176 | 55-176 | Tires for tricycles, scooters, balance bikes for small children, wheelbarrows and carts, prams | ||
| 152 | 10 x 2 | 54-152 | ||
| 137 | 8 x 1 1/4 | 32-137 |
29 tires differ from 28 only in height. Tire width selection is more flexible than rim diameter.
Rim widths are measured and marked in millimeters as shown in the figure at the beginning of the article.
How to measure the width of the rim is described in a separate article here.
| Rim width in mm | Tire width in mm and inches | Bicycle type |
| 13 | 18 - 25 mm (1") | road and cyclocross models |
| 15 | 23 - 32 mm (1" - 1.25") | |
| 17 | 25-37 mm (1" - 1.5") | light cross-country and hybrid models |
| 18 | 28 - 44 mm (1.1" - 1.75") | Heavy XC/Hybrid |
| 19 | 28 - 60 mm (1.1" - 2.35") | MTB (mountain bikes, mountain bikes) |
| 20 | 28 -47 mm (1.1" - 2") | cycling and light extreme |
| 21 | 35 - 50 mm (1. 4" - 2") | |
| 23 | 40 - 50 mm (1.5" - 2.1") | extreme cycling |
| 25 or more | 44 - 57 mm (1.75" - 2.25") | |
| 32 | 75 mm (3") and over |
This table is a guideline for an average bike. Use it not as a dogma, but as a guideline for selection.
Some manufacturers give their own tables for the tires they produce, according to which they need to be selected for their wheel.
The width of the tire affects rolling and traction. The wider - the better the grip, cornering control, but the worse the roll.
It is considered optimal if the width of the tire is 1.5-2.1 times wider than the inner width of the rim. It is possible and 2.5 times, but this is already an amateur.
The tire-to-rim width ratio affects the tire's cornering behavior. Too wide tires mounted on a narrow rim can simply break. will have a pear-shaped profile.
Further, if the wheel is equipped with toothy rubber, then the side spikes on the tread will not be where they should be for sure grip in the turn.
With wide tires on a narrow rim, the side studs will be too high and will not hold properly in the turn.
On narrow tires with a wide rim, the spikes will be from below and with a good slope, the bike will ride on the sidewall, and she is bald.
Below is the famous table compiled by Georg Boeder of tire and rim width recommendations
fractional inches) here.
