
Motor wheel
How it works
Available for any sized bike
The Swytch Kit can convert almost every bike, with 13 wheel sizes to pick from. If you don’t see your wheel size you can select our
hub-only option and get a wheel built up at your nearest Swytch partner store.
Our GO and AIR/MAX Kits currently come with just the front motor wheel option. If you are interested in pre-ordering the MAX+ or MAX++ Kit then we are offering the option to upgrade to a rear motor wheel if you prefer – subject to available wheel sizes in the Order Portal.

Common sizes included for bikes:

BEHIND THE SCENES
Made in the UK!
We custom-build each motor wheel at our wheel building facility in Norwich, UK. This allows us to offer ANY wheel size, made to order to match your bike.

Step 1
Find your wheel size
Wheel sizes can be confusing. Whatever bike you have, our video explains how to quickly find the wheel size.
How to confirm that my bike has a...
28”
Measurement method 1 Size markings
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 28” wheel: 622, 700c, 28, 29er.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 27.5” wheel: 584, 27.5, 650.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 27” wheel: 630, 27, 650.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 26” wheel: 590, 26
Please note there are two 26″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 26” wheel: 599, 26
Please note there are two 26″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 24” wheel: 507, 24.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 22” wheel: 457, 22.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 20” wheel: 451, 20.
Please note there are two 20″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 20” wheel: 406, 20.
Please note there are two 20″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 18” wheel: 355, 18.

ETRTO
French
English
If your bike tyre has any of the following numbers on it (anywhere on the tyre), then it’s a 16” wheel: 349, 16.

ETRTO
French
English
Measurement method 2 Ruler
Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 711.2mm then it is a 28” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 698.5mm then it is a 27.5” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 685.8mm then it is a 27” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 660.4mm then it is a 26” wheel.
Please note there are two 26″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 660.4mm then it is a 26” wheel.
Please note there are two 26″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 660.4mm then it is a 24” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 558.8mm then it is a 22” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 508mm then it is a 20” wheel.
Please note there are two 20″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 508mm then it is a 20” wheel.
Please note there are two 20″ wheels, both with different ETRTO numbers, please check you have the correct ETRTO in this case.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 508mm then it is a 18” wheel.

Measure the diameter of the wheel from edge to edge of the metal rim. If the measurement is 508mm then it is a 16” wheel.


Step 2
Find your axle size
You can identify what axle size you by measuring the gap with a ruler. Note if you have a folding bike, the narrow motor wheels all come with an 8mm axle size.
Frequently Asked Questions
Got a question?
Category
Can I upgrade my GO Kit to a MAX+ Kit?
Yes, since both kits use the same motor wheel, you can purchase a MAX+ Upgrade Kit through our pre-order launch (join the waitlist to receive an invitation). The Upgrade Kit includes the MAX+ Power Pack, mount, and charging adapter, so you can keep your existing motor wheel and pedal sensor.
Can I upgrade from the AIR/MAX Kit?
Yes, the MAX+ Power Pack Kits use the same mounts and firmware as the AIR/MAX Kits, so you can easily upgrade by pre-ordering an additional MAX+ Power Pack, also known as the upgrade kit. Sign up to our waitlist to be invited to our next pre-order launch.
Can I change the brightness of the be-seen front light?
Yes, the multifunctional button on top of the Power Pack allows you to adjust the brightness level, whether you’re riding on a dimly lit country road or through the city. There’s a setting to suit any environment.
Can I turn the be-seen front light on/off?
Yes, the front be-seen light on the MAX+ can be easily and quickly turned off using a button on top of the Power Pack.
If my rear wheel is a freewheel do I need to replace the gears?
If your bike’s rear wheel has freewheel gears, those gears won’t be compatible with the Swytch rear motor wheel cassette. You will need to purchase additional cassette gears in your preferred ratio, but this may still lead to issues like gear skipping. Therefore, if your bike’s rear wheel has freewheel gears we recommend picking a front motor wheel instead for ease of installation.
The easiest way to determine if your bike’s rear wheel has a freewheel is to push the bike backwards. If the pedals rotate backwards, you have a cassette rear wheel. If the pedals stay still, you have a freewheel.
Do the rear motor wheel options come with gears?
Our rear motor wheel options do not include gears, so you’ll need to transfer the gears from your original bike using the appropriate tools and following our provided instructions.
What rear wheel options are available for MAX+?
28″/700C/29er, 27.5″, and 26″ sizes are available, with options for both standard fitting and thru axle configurations. Please note this is only available for MAX+ kits.
Which tyres are not compatible?
The Swytch motor wheel is designed to accommodate tire widths ranging from 1.1 to 2.5 inches (28 to 64 mm) only, which excludes fat tyres and very narrow road tires. Please purchase a tyre that is compatible for the Swytch motor wheel.
Is the Kit compatible with Thru-axles forks?
Our MAX+ range is fully compatible with thru-axle bikes, offering a perfect solution for those looking for this compatibility.
Is there any drag from the motor wheel?
The Swytch Kit features an advanced brushless geared motor with virtually zero drag when the power is off. This means that if you remove the power pack or turn it off, the bike operates just like a regular, non-electric bike, providing a smooth and efficient ride with virtually zero added resistance.
How will I pick my wheel size?
We have detailed articles available to help you determine the correct wheel size for your bike on our help centre.
What is the motor power output of the Swytch Kit?
Our motor wheel has a rated power of 250W and a maximum torque of 40 Nm.
Is the Kit compatible with Thru-axles forks?
To expand compatibility with a wider range of bikes and better meet the needs of our customers, we have introduced a rear wheel that is available exclusively with the MAX+ range. This rear wheel is designed to be compatible with bikes that have thru-axles.
Can I use the Swytch Kit on a bike with disc brakes?
The Swytch Kit is 100% compatible with disc brakes, including both hydraulic and cable systems. All standard Swytch motors feature 6 screws on the outer part, allowing you to securely fit your existing disc brake to the motor.
