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Forklift Tires | Resilient Solid Tire | General Standard : Black Rubber
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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. nine0003
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. nine0003
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 you need to know when choosing a tire is the size of the wheels. 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 seat size (diameter) of the rim or BSD (English 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. nine0003
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"). nine0003
The most accurate, understandable and convenient. Describes in millimeters all the necessary dimensions. For example, 28-622, where 28 mm is its width and 622 mm is inner (landing) diameter . 
nine0022 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. nine0003
Note a very important nuance and paradox in inch sizes.
Tire sizes can be specified as a decimal fraction, such as 26x1.75, or as a simple fraction, such as 26x1 3/4. nine0003
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 have tried to collect the most common tire size designations in different systems and show their compatibility. nine0003
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 | nine0128 700-18C18-622 | |||
| 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 | nine0142||
| 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 | nine0128 700-50C50-622 | |||
| 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 | nine012847-599 | 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 | nine0595 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 | nine0142|||
| 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. nine0130 |
| 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 | nine012844-559 | |||
| 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 | |||
| 26x2.15 | 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 | |||
| 26x3.7 | 95-559 | |||
| 26 x 4.00 | nine0128100-559 | |||
| 26x4.5 | 115-559 | |||
| 26x4.8 | 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 | nine0128||
| 531 | 24 x 1 5/8 x 1 1/2 | 44-531 | nine0128||
| 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 bikes | |
| 500-35A | 37-440 | |||
| 20 x 1 1/2 | 500-38A | 40-440 | ||
| 438 | nine0128 20 x 1 3/837-438 | 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) nine0004 "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 | nine012865-406 | |||
| 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 | nine0176 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. nine0130 | |
| 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 bikes | |
| 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 | nine0128 40-330Children'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 | nine0128 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 | nine0142|||
| 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.
nine0003
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 cross-country and hybrid models |
| 19 | 28 - 60 mm (1.1" - 2.35") | nine0128 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 shows guide data for a medium 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 tire width affects rolling and grip. The wider - the better the grip, cornering control, but the worse the roll. nine0003
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. nine0003
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. nine0003
Comments (132)
x nine2073
The standard designation is based on the outside diameter of the tire.
This size is usually expressed in either inches (26", 27", etc.) or millimeters (650, 700, etc.).
Unfortunately, the evolution of rims and tires has led to the fact that this marking no longer matches the actual diameter. The history of this confusion dates back to the 30s of the last century, when heavy thick tires "baluners" measuring 26 x 2.125 were popular, which are still installed on some pleasure and beach bikes. The outer diameter of such a wheel is very close to 26". Many cyclists, however, were not completely satisfied with the characteristics of these wheels and wanted something faster and lighter. The industry responded to their request by producing lighter and narrower tires that fit the same rim, and designated 26 x 1.75.
Although these tires continued to be called "26" tires, their actual diameter was 25 5/8", not 26". Later, the same rim size was used by the pioneers of the US West Coast mountain bike, which remains the standard size for mountain bikes today.
The market began to dictate its terms to manufacturers, and tires with a width of only 25 millimeters for the “26-inch” rim appeared on sale. In fact, the outer diameter of the wheel was 24 7/8".
In the standard tire size designation, the second number or letter code indicates its width. For example, 26 x 1.75; 27 x 1 1/4; 650B; 700C.
Please note that in the standard inch tire sizing system, its width can be indicated as a decimal fraction (26 x 1.75) or a simple one (26 x 1 3/4). Although in a mathematical sense the width of these tires is equivalent, in practice they are incompatible. This fact often leads to the fact that an insufficiently competent buyer purchases a tire of the wrong size.
In general, it's hard to come up with a generalized rule for tire sizes, but I was able to identify one pattern:
If the size of the two tires taken coincides mathematically, but one of them is expressed as a decimal and the other as a simple fraction, these two tires are definitely incompatible.
In a fierce competition, the accuracy of information provided by manufacturers often suffers. Let's say you're looking for high quality 700-25 tires. Naturally, you study both catalogs and advertisements to find the lightest tires in this size. If, for example, Pepsi Tire and Coke Tire produce tires using the same technology and roughly the same quality, but Pepsi labels a 24mm tire as 700-25, it will weigh less than a fairly labeled 700-25 tire from Coke. This marketing technique gives Pepsi a tangible advantage. In response, Coke is releasing the even lighter 700-23 tire, again labeling it 700-25. nine0003
In the 70s and 80s, this marketing ploy was very popular. As a result, the situation got completely out of control, and all manufacturers still had to take their heads and start indicating only the true dimensions of their products.
The International Organization for Standardization (ISO) has developed a universal tire size designation system in order to avoid errors and various incompatibility issues.
This system was originally known as the "ETRTO system", developed by the company of the same name (European Tire and Rim Technical Organization). nine0003
The ISO system uses two numbers. The first is the width of the tire or rim in millimeters. The actual width of the tire depends on the width of the rim, which is measured along the inner beads (see figure).
The second ISO number is the most important - indicates the rim seat diameter (BSD, from the English "Bead Seat Diameter") in millimeters. It determines the interchangeability of tires. If this number matches the rim and tire, then they are compatible.
For example, a 700 x 20 C road tire is ISO 20-622; hybrid tire 700 x 38 - like 38-622. Due to the difference in width, they may not be perfect replacements for each other, but most importantly, any rim that fits a 20-622 tire will also fit a 38-622 tire. nine0003
Also, it is important to consider that the width of the tire should be 1.45-2 times wider than the inner width of the rim.
If you deflate a tire and measure its bead width, the result is approximately 2.5 times the ISO value.
The following tables show the relationship between US standard sizes and ISO bore.
| 29" | 622 | Accepted name introduced by marketers. Refers to tires with a 622 mm bore ("700c"). |
| 28 x 1 1/2 | 635 | English, Danish, Chinese and Indian rod-brake road bikes (also designated F10, F25, 700 B). |
| 28 x 1 5/8 x 1 1/4 | 622 | Obsolete Canadian F.13 designation. nine0130 |
| 28 x 1 5/8 x 1 1/4 | 622 | Northern European designation for 622 mm (700 C) tires. |
| 27 x [number] | 630 | Old road bikes. |
| 26 x 1 (650 C) | 571 | Triathlon, time trial, small road bikes. |
| 26 x 1 1/4 | 597 | Old British sports and club bikes. |
| 26 x 1 3/8 (S-6) | 597 | Schwinn light bicycles. |
| 26 x 1 3/8 (E.A.3) | 590 | Most 3-speed bikes, 10-speed kids bikes or supermarket bikes. |
| 26 x 1 1/2 (650B) | 584 | French touring or touring bikes, a few Raleigh (USA) and Schwinn mountain bikes. nine0130 |
| 26 x 1 3/4 (S-7) | 571 | Schwinn Cruisers. |
| 24x1 | 520 | High quality wheels for small riders. |
| 24 x 1 1/8 | 520 or 540 | Buyer beware! |
| 24 x 1 1/4 | 547 | Children's bicycles Schwinn or British. | nine0142
| 24 x 1 3/8 (S-5) | 547 | Light children's bikes Schwinn. |
| 24 x 1 3/8 (E-5) | 540 | British children's bicycles, most wheelchairs. |
| 20 x 1 1/8 20 x 1 1/4 20 x 1 3/8 | 451 | Light children's bikes, BMX for light riders, some ligerades. |
| 20 x 1 3/4 | nine0128 419Schwinn children's bicycles. | |
| 17 x 1 1/4 | 369 | Alex Moulton. |
| 16 x 1 3/8 | 349 | Old Moulton, Brompton and other folding bicycles, ligerade front wheels, children's bicycles. |
| 16 x 1 3/8 | 337 | Extremely mysterious tire size. |
| 16 x 1 3/8 | 335 | Polish children's bicycles. |
| 16 x 1 3/4 | 317 | Schwinn children's bicycles. |
| 12 1/2 x [number] | 203 | Children's bicycles, scooters |
| 10x2 | 152 | Wheelchairs. |
| 8 x 1 1/4 | 137 | Wheelchairs. |
It is also worth noting that initially fractional sizes were introduced for old rims with straight sidewalls. The more functional dimensions of 571mm / 26 x 1 and 630mm / 27 came later, on lug rims.
| 29" | 622 | Accepted name introduced by marketers. Applies to 622mm ("700c") tires. nine0130 |
| 28 x [dec. number] | 622 | Some German tire manufacturers use this designation for tires with a bore diameter of 622 mm ("700c"). |
| 26 x 1.00 to 2.3 | 559 | Most mountain bikes, cruisers, etc. Except as follows: |
| 26 x 1.25 (obsolete) | 599 | Very old USA light bikes. nine0130 |
| 26 x 1.375 | 599 | Very old USA light bikes. |
| 24x1.5-24x2.125 | 507 | Children's mountain bikes, cruisers. |
| 22 x 1.75; 22 x 2.125 | 457 | Children's bicycles. |
| 20x1.5-20x2.125 | 406 | Most BMX bikes, kids bikes, folding bikes, touring bikes and some ligerades. nine0130 |
| 18 x 1.5 | 355 | Birdy folding bikes. |
| 18x1.75-18x2.125 | 355 | Children's bicycles. |
| 16x1.75-16x2.125 | 305 | Children's bicycles, folding, touring and some ligerades. |
Initially, in the French system, the first number indicated the outer diameter of the rim in millimeters, followed by the letter that determined the width: "A" - narrow, "D" - wide. The letter code is no longer associated with tire width, as narrow tires are often made to fit rims originally designed for wide tires. For example, the 700C size was originally a wide size, but now there are also very narrow 700C tires that have an actual diameter of only 660 mm. nine0003
| 700A | 642 | Obsolete size. |
| 700 B | 635 | Road bicycles with rod brake system. |
| 700 C | 622 | Road bikes, hybrids, 29" mountain bikes. (28 x 1 1/2 F.13 Canada) |
| 700D | 587 | nine0128 Odd size previously used on some GT bikes.|
| 650A | 590 | French version 26 x 1 3/8; Italian high quality bikes for light riders. |
| 650 B | 584 | French pleasure bikes, tandems, touring bikes; some old Raleigh bikes and Schwinn mountain bikes. |
| 650 C | 571 | Triathlon, time trial, high quality road bikes for light riders. |
| 600A | 540 | European children's road bikes, most wheelchairs. |
| 550A | 490 | European children's road bikes. |
| 500A | 440 | nine0128 European children's folding bikes.|
| 450A | 390 | European children's bicycles. |
| 400A | 340 | European children's bicycles. |
| 635 | 28 x 1 1/2, 700B |
| 630 | 27 x number |
| 622 | 700 C, 28 x (double shot), 29 in. (28 x 1 1/2 F.13 Canada) |
| 599 | 26 x 1.25 x 1.375 |
| 597 | 26 x 1 1/4, 26 x 1 3/8 (S-6) |
| 590 | 26 x 1 3/8 (E.A.3), 650 A |
| 587 | 700D |
| 584 | 650B, 26 x 1 1/2 | nine0142
| 571 | 26 x 1, 26 x 1 3/4, 650 C |
| 559 | 26x1. |
| 547 | 24 x 1 1/4, 24 x 1 3/8 (S-5) |
| 540 | 24 x 1 1/8, 24 x 1 3/8 (E.5), 600 A |
| 520 | 24x1, 24x1 1/8 |
| 507 | 24x1.5-x2.125 |
| 490 | 550A |
| 457 | 22 x 1.75; x 2.125 |
| 451 | 20 x 1 1/8; x 1 1/4; x 1 3/8 |
| 440 | 500A |
| 419 | 20 x 1 3/4 |
| 406 | 20x1.5-x2.125 |
| 390 | 450A |
| 369 | nine0128 17 x 1 1/4|
| 355 | 18x1.5-x2.125 |
| 349 | 16 x 1 3/8 |
| 340 | 400A |
| 337 | 16 x 1 3/8 |
| 317 | 16 x 1 3/4 |
| 305 | 16x1. |
| 203 | 12 1/2 x number | nine0142
| 152 | 10x2 |
| 137 | 8 x 1 1/4 |
It is certainly possible to use almost any combination of tire and rim that has the same fit, but from a practical point of view it is unreasonable for the width of the tire to differ significantly from the width of the rim.
If the tire is too narrow for the rim, the risk of damage from various bumps and bumps increases significantly. nine0003
If the tire is too wide, the sidewalls of the tire are more likely to wear out quickly and the risk of losing control of the bike on a flat tire increases. Plus, handling at low speeds noticeably worsens.
Unfortunately, in order to save weight, modern mountain bikes use extremely narrow rims. These rims do not fit wide tires very well, unless they are pumped very hard. This, in turn, leads to unnecessary stress on the sidewalls of the rim, and also loses the main point of installing wide tires designed to work with low pressure. nine0003
GMS - Global Measuring System. Existing standards for measuring the size of an inflated tire do not take into account the difference in tread depth. To solve this problem and enable a more accurate comparison of tire performance, WTB introduced its measurement standard - GMS.
The standard consists of two numbers in millimeters: the first characterizes the width of the base of the tire; the second is the width of the outside of the tire, measured over the tread. Measurements are made on a rim with an internal width of 20 mm, and a tire inflated to 60 psi and after 24 hours of exposure. nine0003
In addition to the dimensions of the base and the outer width of the tread, the allowable tire pressure, the main characteristics of the tread and its contact area are indicated.
Single tube tires are most commonly used for cycling. Single tubes do not have sidewalls. During their production, the ends of a solid tire tube are connected to each other, forming a torus.
