Since 1989, Stricker has stood for technical quality, smart ideas and genuine innovation. In recent years, we have proven several times that we set new trends: 2023 with the Smart Dynamic, the first handbike with a torque sensor and our in-house GoJo drive system. This was followed in 2024 by the Lomo GX and the Micro GX - compact, lightweight traction devices with GoJo-Extended control.

In 2025, we are once again breaking new ground: one does away with the chain and gears, the other absorbs vibrations directly in the bike. The Smart Free and the new Z-wheel show what happens when you not only improve, but also rethink. As an active driving force, Stricker is constantly pushing the industry forward. This makes us one of the world's leading manufacturers of innovative adaptation solutions such as handbikes and traction devices in the rehabilitation sector.

The world's first chainless handbike: Smart Free

With the Smart Free, the medium-sized family business R & E Stricker Reha-Entwicklungen GmbH from the Black Forest presents a real world first among handbikes: it is the first model that manages completely without mechanical power transmission - no chainring, no chain, no rear derailleur. Instead, it relies on a technology that is only just being tested in the bicycle industry: Bike-by-Wire.

This is a new approach that we recognized early on and have developed into a testable system. Motor power and pedal resistance can be controlled separately. This creates an individually adaptable riding profile that offers a real alternative, especially for users with disabilities. The electronic back-pedal brake also works intuitively: cranking backwards immediately generates a natural braking impulse.

The result is a pioneering solution with tangible benefits - in terms of comfort, operation and maintenance.

At the center is a generative crank unit - the so-called control head: When pedaling, electricity is generated that supplies the drive motor via the battery. The headset is individually adjustable in height, angle and distance and can be folded in or completely removed for transportation. No rear derailleur that can shift. No oily parts. No risk of something getting dirty or misaligned during loading.

The system also offers new technical freedom: Both the pedal resistance and the motor assistance can be individually adjusted. This results in finely adjustable riding profiles - precisely tailored to the physical conditions and needs of the user. This is a great advantage, especially in rehabilitation.

The back-pedal brake works electronically via the generator: if you crank backwards, you immediately feel a clear, powerful resistance - very similar to a mechanical back-pedal brake. The effect is purely electronic, but feels completely natural.

For users, this means less maintenance, more flexibility and a realistic, direct riding experience. Resistance and motor power can be regulated independently of each other in several stages - for a riding experience that can be adapted to individual needs. The clean, robust system does away with sensitive components such as the rear derailleur or chain and therefore remains reliably ready for use even when traveling.

The low-maintenance design can be particularly important for people with severe limitations: Those who have previously tended to opt for a pull-only device due to concerns about technical problems or the amount of maintenance required could be encouraged by this new simplicity to take a more active part in riding again. This creates new access to movement - without additional hurdles.

The Smart Free is not a concept from the drawing board, but a ready-to-ride system. We have implemented, tested and further developed the technology. Now we want to know how it performs in everyday life - and whether it delivers what users expect from it.

The Smart Free can be tested at REHAB in Karlsruhe (2025), Irma in Bremen (2025), the in-house exhibition of Rolli-World GmbH in Kirchheim near Munich (2025) and by appointment at the factory.

Comfort from the wheel hub: 

Z-wheel

In collaboration with zak mobility, we have equipped our first handbike with in-wheel suspension. The Z-wheel absorbs shocks from all directions and reduces vibrations by up to 110 percent. The ride is significantly smoother, especially on uneven surfaces.

The built-in carbon spring ensures an even distribution of force when braking and accelerating. The low unsprung mass improves responsiveness and at the same time protects the engine.

Compared to conventional suspension forks, the Z-wheel is lighter, easier to handle and low-maintenance. It noticeably increases riding comfort and pays off especially on long distances or rough surfaces.