Knowledge

How To Identify My Wheel Size?

How to identify my wheel size

There are many ways to mark the size of bicycle wheels. We can find these markings on the side of the tire. Usually there are three kinds of markings: ISO/ETRTO, English size and French size. As shown below:

How to identify my wheel size

Please note that the same English size may refer to different wheel sizes. For example, the 20-inch 406 and the 20-inch 451 are both 20 inches, but they are two completely different wheel sizes.

Important: When choosing wheel size, please try to use ISO/ETRTO sizes to ensure you choose the correct wheel size.

Because there are so many wheel sizes, we have only listed the commonly used wheel sizes. If your wheel size is not in the table below, please contact us at sales@100g.tech for customization.

Geeko Wheel Size ISO/ETRTO English Size French Size
622-28″/29″-700C 622 28″ / 29″ 700C
584-27.5″-650B 584 27.5″ 650B
559-26″ 559 26″ NA
507-24″ 507 24″ NA
457-22″ 457 22″ NA
451-20″ 451 20″ NA
406-20″ 406 20″ NA
355-18″ 355 18″ NA
349-16″ 349 16″ NA
305-16″ 305 16″ NA

8 thoughts on “How To Identify My Wheel Size?

  1. Pietro says:

    Hello, do you plan to have the product fit for Thru-axle bikes?

    1. Gina says:

      Hi, I’m sorry, there is no definite release date yet.
      The main problem is that there are so many specifications for the thru-axis and as a supplier we would like to develop one or two types of products to fit most of the thru-axis. This is difficult so we need more time.
      Thank you for your attention.

  2. Hi i have a 500 watt geeko kit on my road bike but now i bought a fat bike with a 26×4 inch wheel would like to just buy rear wheel with 500 watt motor and use my battery do you have that and what would it cost canadian

    1. Gina says:

      Hello, thank you for your enquiry and have a nice day!
      We are very sorry that our rims are not suitable for fat bikes
      The outer width of the rims we offer is 25MM, the rim height is 21cm, double-wall aluminium rims, suitable for tyres with a width of 1.5-2.2 (or 700X23C-42C).

  3. PETER JAUN says:

    Für eine Umrüstung an meinem Rennvelo brauche ich folgende
    Teile: Nabenmotor Geeko-hinten – 28 Zoll Rad – 11fach Shimano Kassette –
    Einbaubreite 135 mm – Scheibenbremsen – Reifengrösse 25 – 28
    2 Akku schwarz Bidonhalter
    Steuerung 45 Km
    Bitte um Rückmeldung ob diese Teile so Lieferbar sind!!!
    Vielen Dank Jaun Peter Saumackerstrasse 70 8048 Zürich

    1. amber says:

      Hallo, wünsche dir einen schönen Tag!
      Ja, das Kit ist verfügbar. Wir empfehlen den Prime-25100R, der am besten erhältlich ist und Ihren Anforderungen entspricht.
      Bei weiteren Fragen können Sie mich gerne kontaktieren.

      1. msinfo says:

        Habe das Rear-Kit mit dem Prime-25100R am 25.9.2023 und bis heute noch nicht erhalten (10 Wochen).

        1. amber says:

          Hallo, wir entschuldigen uns für die Verzögerung.
          Das Kit ist in Polen und unter Zollabfertigung, so dass es länger dauern wird für die Lieferung. Wie Sie wissen, ist der Zoll nicht Gegenstand der Vereinbarungen der Spediteure. Aber wir haben den Spediteur geschoben, bitte warten Sie geduldig, vielen Dank für Ihr Verständnis.

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