Answers to most frequently asked questions

How do I install Rubbee X onto my bicycle?

Rubbee X is all about simple installation. Attach the lock mechanism onto the seat tube of Your bicycle and insert Rubbee X into it. There’s also a small wireless cadence sensor that must be attached to Your pedal crank before the first ride. But don’t worry – no wires or magnets go to or from it, just two cable ties to secure it and You’re good to go ! Bicycle compatibility chart can be found HERE.

How do I control the power of Rubbee X?

Rubbee X is controlled by an easy to install PAS (Pedal Assist Sensor) or in simpler terms – wireless cadence sensor. The sensor has to be mounted on the bicycle pedal crank and it provides information about when and how fast the person is pedaling. By knowing these things and combining them with the speed of the entire vehicle (Rubbee tracks the vehicle speed using the motor as a speed sensor) Rubbee can control the amount of power independently without any user interference. When You are pedaling – Rubbee provides power. You stop pedaling – Rubbee stops providing power and starts freewheeling . Simple, it’s like Your leg movements become an ON/OFF button. Rubbee becomes a natural extension of Your muscle power. When a hill is encountered and Your speed is decreasing but pedaling rate increases Rubbee enables a higher power output. High speed and slow pedaling will have an opposite effect – a lower assistance level will be selected. Rubbee X makes these calculations and power modulations multiple times a second.

The maximum assistance power level can be controlled via the main button. just press is to cycle through different power modes. ECO / CRUISE / POWER modes are available depending on how many batteries are installed. ECO is available with 1 installed module, CRUISE with 2 modules and POWER mode becomes available when all 3 battery modules are installed. These modes can also be changed via the smartphone application.

Does Rubbee X have regenerative braking?

Yes it does ! When pedals are turned backwards for half of a revolution, regenerative braking mode is enabled. This way, when a long downhill section is encountered the regenerative braking can recharge the batteries. Normal operation is resumed once pedals are turned to move forward. When the batteries are fully charged, the regenerative braking mode will not be available until the batteries are discharged to the allowed limit.

How does the Rubbee transfer energy to my bicycle?

Rubbee is a friction drive. It has a rotating drive roller at the back end of the system which directly touches the rear wheel of the bicycle and helps You move forward. Simple. It provides additional power directly to Your rear tire when You need it the most.

Does Rubbee X slip on the tire?

In most cases, it does not slip. There are 3 key reasons why.

  1. Electronic anti-slip control. If slipping is detected, the motor torque modulates similar to how ABS system works in a car.
  2. Active suppression system. Rubbee X is pushed to the tire not only by it’s weight, but also with a 200N pneumatic cylinder.
  3. Special roller. Both material, shape and surface texture of the roller is optimized for increasing grip in all weather conditions.

How does the modular battery system work?

Base model Rubbee X comes with 1 battery module installed. If You want more range, speed and power, You can install more batteries, up to 3 modules in total. Additional batteries increase the torque and range of Rubbee X . With all 3 modules installed the POWER mode becomes available. This mode is only for off-road and private roads since it exceeds power and speed limits of EU regulations.

To install extra batteries 6 screws should be removed from the bottom of the device and new batteries inserted. After installing new battery modules, the whole device must be plugged in to do a complete recharge.

Does the friction roller wear my tire a lot?

Rubbee X adds additional wear to the tire but nothing that should be worried about. We cast the rollers from a specially developed polyurethane compound mix which guarantees the best contact between the tire and the roller. This compound also allows us to reach phenomenal grip in wet conditions. We test roller materials for thousands of kilometers (literally!) on the same tire without drastic wear&tear. In any case it is generally recommended to change bicycle tires every 2000-3000 km so we recommend to follow this rule. Cool fact – our roller material is also used in high-end sports cars suspensions !

Is Rubbee X street-legal ?

Yes, Rubbee is street legal in EU and USA. It follows the EN15194 e-bike regulations and has a rated power of 250 W, top speed of 25 km/h and it requires a PAS sensor to operate. Rubbee does not require license or number plate on the bike to operate. Just hop on and You are ready to go !

I have 2 bicycles at our home. Will I be able to use Rubbee on both of them?

Yes! You can change from one bike to another in just a matter of seconds. The only thing You will have to do is to install the Second Bike Kit on the other bike. It includes a sensor and the lock mechanism. One Rubbee X – two (or more) bikes !

I’ve seen Rubbee somewhere before, what’s the story behind this project?

Rubbee has quite an extensive history. We’ve been producing these devices since 2013 although the product itself changed drastically throughout the years. You can find the whole story over HERE.