DISCOVER THE FUTURE OF MOBILITY

Experience a foldable way to ride an electric bike

*Patent pending

  • "Step into the future of urban mobility, where each fold unveils an electrifying journey filled with style, sustainability, and seamless convenience."

    RS Development

SKETCHES

  • "Compact excellence for a ride that's powerfully unique - where innovation meets efficiency."

    Kappstein

PREMIUM E-FOLDING BIKE CONCEPT

  • Fully adjustable handèle bar reach and trip position, tool free Dropper seatpost for automatic saddle height adjustment.

  • Material fusion of carbon & titanium 3D printed

  • Highly efficient E-system, silent, natural riding feeling

  • Intuitive, safe and simple holding mechanism wireless shifting

  • Design & fonction integration maintenance free carbon belt drive internal 2-speed E-shifting gearhub

  • Integrated suspension combined with big volume tires

E-FOLDING BIKE CONCEPT

  • S3 pack solution

    S3 pack solution / battery

    Includes S3 mid-motor, precise encoding sensor, PMS controller, HMI and battery (21700).

    Very easy to use and install, no special calibration required.

    New generation cells 21700

    Hidden inside frame

    Easy removable

  • S3 mid motor

    S3 mid motor

    First direct drive mid-motor in the market Highly efficient, silent and durable

    Offers a very natural and smooth ride feeling Very light and compact (cylindric shape)

    All-in-one design (controller and torque sensor hidden internally)

  • suspension

    Suspension

    Integrated suspension for smooth ride

    Hidden rear shock

  • Grip Brake Lever

    Grip brake lever

    Unique bicycle brake lever

    Brake by turning the handlebar lever

    Very clean look with cable Inside tube Includes special cylinder pump design

    Provides very strong brake

  • 2 Speed Hub

    2 speed hub

    2-speed internally geared rear hub (ratio1:1.57)

    Compatible with standard cassettes and belt drive

    Electronic shifting (wireless or with wire)

    Integrated rear lights

  • Carrier

    carrier

    Folding carrier

    Integrated front light

  • belt

    belt drive

    Belt Carbon drive

    Clean, silent, maintenance free

partners

  • Rolf Singenberger

    FOUNDER

    With three decades of bike industry experience, Rolf Singenberger stands out as a passionate product designer and savvy business developer. He's earned numerous international design awards and holds patents for his groundbreaking innovations.

    During his 13-year tenure at BMC Switzerland, from 2001 to 2014, Singenberger led R&D and product management, steering the brand to victory in events like the Tour de France and Olympics, while setting new technology standards in performance bikes

    In 2014, he founded RS Development LLC, offering consultancy services to leading bike brands. Singenberger's expertise continued to shape the industry, highlighted by the launch of his own e-bike brand, LOGO, in 2018, and succesfully sold the company to one of the biggest cycling group during Eurobike 2021.

    Despite his entrepreneurial ventures, Singenberger remains dedicated to driving advancements in cycling technology through RS Development, cementing his status as a formidable force in the bike industry.

  • E-Mobility

    We are an innovative company from Gotha/Thüringen, which has specialized in the development and production of E-motors and premium bike components since 12/12/2012. Thanks to the Kappstein founder Christian Gerlach and Xuefeng Ye's many years of experience in the E-Mobility field we are able to prepare individual E-Mobility solutions for pedelecs and speed pedelecs according to the customer's requirements.

    Chainrings & sprockets

    With the production of the first Kappstein Sprockets for our electric motors and a chainring for the Doppio, we quickly recognised the potential of our state-of-the-art machinery for the production of high-quality chainrings and sprockets for cycling. Meanwhile, we are in close contact with the FES(Institute for the Research and Development of Sports Equipment) as well as with professional athletes in order to continuously develop our products further.

    Our latest development is the ProLine drive series. It combines high-precision manufacturing technology, innovative tooth design (round teeth design), special material tempering and drastic weight reduction — and all this for narrower 11-speed chains.

    Mechanical components

    Apart from our core business of electromobility for bicycles, our expertise primarily lies in the development of innovative mechanical drive components. The centrepiece is our bottom bracket gearbox “Doppio”. Our engineers have successfully accommodated a planetary gearhead with 6 planets in a very small space. The result is an extremely slim and lightweight 2-speed gearbox offering many possible combinations. A further attractive feature is the “Silent Freewheel Hub”, a rear wheel hub with an immediate frictional connection and an almost noiseless freewheel.

    Metal processing

    Kappstein also offers the possibility of a wide variety of external processing options. We are always open to new and demanding projects. In close cooperation with the customer, we always try to meet even the most specific customer requirements. Thanks to our quality standards, a solid company network and state-of-the-art lathes and milling machines, we are able to meet almost any customer requirement.

"Ready to ride with us?”

Let's propel the E-Folding Bike project to new heights together.

Reach out to discuss a collaboration!