Easy to mount

A goal in the development of the ONwheel was to be able to offer a mounting kit (Shop) which can be mounted on almost every bike by almost everyone.

Our record is 3:47min. For mounting the basic kit (mounting kit) on which the ONwheel and the battery are simply plugged in (Plug & Play). The bike was a crossbike with no pedestals and with a stand mounting plate behind the bottom bracket. Or in other words, that was easy.

From feedback from our customers, we know that an average assembly takes about 20-40min.

You can find a detailed installation guide here here.

For touring bikes with mudguards and Hollowtech cranks, mounting can take longer and for fullys (front wheel and rear wheel suspension) or folding bikes mounting often is not possible at all. If you have such a bike, you should definitely check with our Support team before purchase!

All in all, we assume that mounting is possible at about 70-80% of all wheels. Up to now it is generally not possible to mount on a carbon bike.

Installation on a mounting plate

Particularly suitable are bicycles which have a bicycle stand behind the bottom bracket or a corresponding stand mounting plate, since in fact only the stand (if available) is exchanged for our mounting kit.

If there are shift cables under the bottom bracket, we recommend to order the optional wedge plate to lower the ONwheel.

Installation on a cross tube

In the case of bicycles without a pedestal plate, at least one cross tube should be provided behind the bottom bracket. For this assembly, we offer an appropriate mounting adapter kit, which should be ordered together with the first purchase.

Please note! The free space between the bottom bracket and the cross tube should not be less than 25mm! Should trains run in this area, it`s 25mm to the point where the train can not be pushed away.

In the area of the cross-tube to the bottom bracket, there should also be no protruding holders (for example, for floor supports) since the carrier plate rests there.

Attention! Possibly the derailleur must be slightly displaced for the circuit during assembly.


The PAS sensor

In most countries the Pedelec regulation applies. This means that the electrical support is only permitted if the driver himself comes into the pedals. The pedal assist system sensor (PAS) is needed to measure this. This gets informations via the supplied magnetic disc whether the pedals are in motion.

The PAS sensor itself is usually simply attached to the bottom bracket.

Mounting left side:

Recommended, if there is enough space on the left pedal side (not the chain side), the magnetic disc is simply placed on the pedal axle. There must be at least 5mm of space between the bottom bracket and crank arm.

Mounting right side:

For bicycles in the higher price class, there is often no distance between the bottom bracket and the pedal crank. In the case of wheels with a three blade chain connection, the magnetic ring can be mounted ordinary on the smallest chainring. The mounting is ensured at 64-BCD * and 74-BCD * chainrings. For other chains, it may be necessary to attach individual magnets (included in the set for right mounting) to the chainring.

* Standard specifies the pitch circle of the chainring screw connection.

In the case of wheels with chain guards, the brackets for chain protection are often in the way. Assembly could become difficult here. Please contact our support team!

A PAS mounting on the right side is not possible for chain boxes! If it is also not possible to mount on the left pedal side, the PAS sensor probably can not be attached. In countries without peddling obligation, the PAS sensor can be connected via APP and the ONwheel can be operated with the optional accelerator throttle.


The speed sensor is used to measure the speed at the rear wheel. So we can determine if the bike reaches its minimum speed of 6km/h and the maximum speed (standard 25km/h) has not exceeded.

The giver is simply glued and secured with two cable ties, the magent screwed to a spoke. There is hardly anything to consider. If the distance between the magnet and the sensor is too big, a second magnet can be applied or the magnet can be attached to a spoke which is closer to the sensor.

Battery pack

The battery is delivered in its holder, the contacts are closed independently when the battery is inserted. The battery holder is designed for mounting on the screw holes for the water bottle holder.

If there are no threads or only unsuitable location for it for a water bottle holder, we offer a holder for pipe mounting in our online shop.

Note that the battery will only fit in a few cases on the down tube of a ladies bike. To check this you can download a template to cut here > template.pdf.


The cable length for the down tube mounting is 25cm. This is sufficient for almost all wheels where the battery should be mounted on the lower tube. For all other installations 60cm cable length should be selected.

Power Buttons:

These are used to select the power levels. The Power Buttons can be attached to the steering rod. The diameter of the bracket corresponds to the standard for bicycle handles. Installation is not always possible beside the handgrip since parts of the circuit or the brakes can get in the way!

Attention: The cable length for the Power Buttons is currently 1100mm. This length can not be sufficient for wheels with a high steering rod. In case of doubt, the distance from the bottom bracket to the handle should be measured with a suitable measuring tape, always adding a few centimeters to allow the handlebar to be sufficiently engaged.

Still questions?

You’re not sure if this works on your bike? In our FAQ many questions are answered directly. If you still have questions, you can get answers via the contact form. For an optimal advice to “does it fit my bike” we recommend to send one or two pictures from the area of the bottom bracket – rear wheel (necessarily photographed from below).

Usually we reply within 48 hours (excluding weekends).

Click here for the contact form