Let us Know More About Our Tyre Size

Let us Know More About Our Tyre Size

Lavi arini

Do you ever wonder what’s marked on your cycle tyre? Do you think that what’s the point of writing some random numbers on a cycle tyre? It is not like the tyre company is trying to pass some highly classified information to you, but these markings tell us about the size and shape of the cycle tyre. A cycle tyre speaks a coded language, and a cyclist should learn how to understand that language to know his best options and get a clear understanding of his needs while purchasing the tyre. If you do not know how to read these markings correctly, you will have a huge chance to buy a different Yokohama Tyres Cheltenham.


Their diameter generally measures tyres, which is why they are marked as 26 inches or 28 inches, but these markings are not as simple to understand as they look. For example, a tyre with marking 28 inches is smaller than a tyre marked 27 inches, whereas 1.5 and 1 ½ could mean two different things. To resolve this problem, companies have started to mark the tyres according to International Standards Organization (ISO).

The numbers on the cycle tyre’s sidewall roughly indicate a mounted tyre's width and outer diameter. There are some common sizes to differentiate between the types of cycle tyres –

Mountain Bike 

For mountain bike lovers, tyres are designed to provide better grip, and their outer diameter could be 26, 27.5 or 29 inches.

Road Bike 

Road bikes generally have an outer diameter of 700 mm, and their width starts from 23mm.

Yokohama car tyres Cheltenham

The ISO marked numbers are separated by a dash, where the first two numbers indicate the width of the tyre and numbers after the dash determines the bead diameter. Bead diameter is the size at which a Buy Tyres Cheltenham can be mounted on the rim. Before ISO, different countries used different standards, which created a lot of confusion. For instance, a 26 inches tyre was denoted differently in countries. ISO then came into existence by ETRTO (European Tyre and Rim Technical Organization).

If two tyres have the same ISO markings, they are exchangeable and can be used in each other’s place even if they are marked differently. It is important to know the bead diameter because it’s become easier to find the right size if it is known.


Now the big question is – what should be the ideal width of a tyre?

There is no ideal width of a tyre as there are different kinds of tyres. Each designed to perform in a specific condition. For example, a road tyre has narrower width as they are designed to provide better stability at high speed and are made for smooth and fast road riding, whereas tyres with a good amount of width have much more load carrying capacity, and they are ideal in terrain and hilly areas.


Tubeless tyres do not have an inner tube that helps in the mounting of the tyre, and therefore they rely heavily on the tightness of the bead to make sure the tyre is fixed properly on the rim. If we talk about tubular tyres, which are mostly used for racing and are considered fast-riding tyres, they need to get fixed on the rim. A way of doing that is to stick them with an adhesive or cement.

Some other markings or writings on a cycle tyre that helps a customer in knowing more about the tyre. Generally, the sidewall of a tyre shows the date of manufacturing, the country in which the tyre is manufactured and the brand to which it belongs. Similarly, the amount of pressure that a tyre can hold is also marked on the sidewall, and it mustn't get exceed. There is a wide variety of cycle tyres available in the market. It is important to make the right call to get a comfortable ride. Therefore, it is important to understand the markings.