ETRTO, the mystery in tires

person Posted By: Allbike list In: Technically speaking On:
ETRTO, the mystery in tires

You've probably come across the acronym ETRTO on bicycle tires.

ETRTO: What is it and what is it for?

-ETRTO (European Tire and Rim Technical Organization) is a European organization that sets technical standards for bicycle tires and rims.

-The ETRTO system uses a 4-digit numeric code to identify tire size and thereby provides crucial information about tire width and diameter.

Decoding the ETRTO Code:

-The ETRTO code is made up of two numbers separated by a period.

-First Number: Represents the width of the tire in millimeters.

-Second Number: Represents the diameter of the tire in millimeters.

Why is ETRTO Important?

-The ETRTO system is essential to ensure compatibility between tires and rims. By following ETRTO standards, the tire is guaranteed to fit perfectly on the rim, providing a safe and efficient cycling experience.

Important tip before buying your new tire:

-Before purchasing a new tire: Check the ETRTO code printed on the old tire or your bicycle rim to ensure compatibility.

-Consider tire width: Tire width affects performance, traction and rolling resistance. Choose a width that suits your rim and based on the type of use

-Adjust Tire Pressure:Tire pressure is crucial to performance and safety. Check the pressure recommended by the manufacturer and adjust it according to the terrain and your weight.

Here is a table with some measurements that you can check compatibility with:

Conventional SizesISO measurement (ETRTO)
 28 x 1 1/2 - 700B635mm
700c - 29"622mm
26" x 1/4597mm
26" x 1 3/8 - 650A590mm
27.5" - 26" x 1 1/2 - 650B584mm
26"559mm
24" 1 3/8 - 600A540mm
24"507mm
20" 1 3/8451mm
20"406mm

-If you don't find your size in this table, we leave here the link to access a website which has very complete information.

-The ETRTO system is a valuable resource for cyclists, ensuring compatibility between tires and rims to provide a safe and efficient cycling experience.

-By understanding the ETRTO code, you will be able to choose the right tires for your wheels and ensure they fit perfectly.

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