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 Sizes | ISO measurement (ETRTO) |
28 x 1 1/2 - 700B | 635mm |
700c - 29" | 622mm |
26" x 1/4 | 597mm |
26" x 1 3/8 - 650A | 590mm |
27.5" - 26" x 1 1/2 - 650B | 584mm |
26" | 559mm |
24" 1 3/8 - 600A | 540mm |
24" | 507mm |
20" 1 3/8 | 451mm |
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.