What is my wheel size?

Don't worry too much about the wheel size before ordering. We offer the kit in ANY size for ANY type of bike, and we can help you check your wheel size after you order. Once your order is in our system we will invite you to our order portal to confirm your bike specifications, including your wheel size. Swytch wheel sizes correspond with the ETRTO (ISO) wheel size measurement standard.

Note: Most adult bicycles (except folding bikes) have a standard ETRTO 622 wheel (28"/29"/700C)

In the meantime, here are a few tips on how to identify your ETRTO wheel size:

 

Ask the bike seller

If you purchased online: Check the bike details on the retailer's website, there will be a "specifications" section which should list the specific ETRTO wheel size.

If you purchased in-store: The ETRTO wheel size is often in the specifications manual that came with the bike, alternatively, the retailer will be able to advise. 

Check tyre markings

Most bikes have the ETRTO wheel size marked on the side of the tyre. 

The images below summarise where to find the ETRTO, French version and English version tyre markings.  Swytch Wheel sizes match the last three digits of the ETRTO marking.

Using the picture below, the ETRTO marking 47-622 means that the 622 Swytch Wheel would fit this tyre. ETRTO markings always take the form of ##-###.  Once you find the ETRTO marking, you can use the table below to match it to the Swytch Wheel size.

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If you can not find any markings on the side of your tyre, then the next option is to measure it yourself.
 

Measure yourself

A final option is to measure the diameter of the rim in mm, which is the approximate equivalent of ETRTO:

  1. Place the tape from the centre of the wheel to the tyre's inner edge where it meets with the rim. This is the inner radius of the tyre (R). [E.g. 317mm].

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2) Multiple R by 2. You now have the diameter of the rim. [E.g. 317*2 = 634mm]
3) Subtract 10mm from the diameter. [E.g. 634-10 = 624mm]
4) Match your measurement with the Swytch Wheel size table above, it should come within ±3mm [E.g. 624mm = 622 Swytch Wheel]
 
A marking on the side of the tyre is a more accurate and easier way of finding out your wheel size and should be used whenever possible.

 

Are you still unsure?

If you are still unsure, feel free to open a support ticket and we will be happy to assist you.

 

Register Now

To be the first to know when we launch, and to ensure you get the maximum discount, don't forget to register to our waitlist here: https://www.swytchbike.com/ 

 
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