Energize your Ride - Smooth Running, Lightweight, Efficient

Energy Solutions for Cyclists

Rim-Drive (Velospeeder e-Bike Motor)
Rim-Dynamo (AC-Dynamo for AC-LED-Lights, Charger)
Velo-Grid (3-Phase Generator for Charger with DC-LED-Lights)

VELOSPEEDER  The World´s Lightest Bicycle Standard Motor                              Unique Self Regulated Contact Pressure - Low Wear

                             For Continuous Operation And Optional Use

                             Retrofittable To Classic Bicycles

                             A Masterpiece Of German Engineerining

                             The e-Bike Motor for Real Bicycles

                                      NEW: Whisper-Quiet Sound & Advanced Functions


The VELOSPEEDER´s motor weight of 500 grams enables this light e-Bike drive to become a standard component for normal bicycles - optionally available when necessary. With a good power performance this full e-Bike rim-drive unit with the lowest possible weight increases the radius of action for cyclists, especially for daily cyclists. The VELOSPEEDER e-Bike motor is the only friction drive for bicycles with dynamic self-regulation of the contact pressure. At any speed, he finds the optimum contact pressure by itself and it doesn´t slip in the wet. When not in use the VELOSPEEDER can be folded away completely. The freedom of maintanance with this energy-efficient miniaturized drive for light electric bicycles is extremely high. Only after 7.000-10.000km a replacement of the friction ring is necessary. Apart from the friction ring, the other engine components are largely free from wear. The rolling action of the friction ring on the rim flank is defined in a way, that the lifetime of the wheel is not affected noticeable by use of the friction wheel motor. The parts of the drivetrain are saved at the same time. The VELOSPEEDER works environmentally friendly, 10x more energy-efficient than a mpoed with combustion engine. Leaving the traffic jam, cycling with the VELOSPEEDER, the GENERATION GREENTECH makes a decision in favor of health and climate.
Installation samples 


The whole electric bicycle with the VELOSPEEDER set is ideal for urban and daily cyclists
With a joyfully durable performance and easily portable across stairs.


Also an electric bicycle may remain simply a normal bicycle, as if it had always been like that.



Framespecific Motor Holder,
Retrofitting & OEM 

Motor Twin Configuration at the Seat Stays,
Standard Installation 

Brazed-on Motor Holder,
Framebuilder Version



The VELOSPEEDER is a so-called friction drive. Its potential for a "standard motor" among e-Bike drives distinguishes this approach from all current concepts on the market. Two small electric motors, arranged on the left and right side of the rear wheel, wedge at the rim flanks when the motors get started and drive the wheel foreward. The VELOSPEEDER creates its necessary driving forces largely by itself and follows the guiding principle "as much as necessary, as little as possible" - no slipping when starting up (even when wet), no braking effects at higher riding speeds.

The trick by which this patented invention is different from all other friction wheel drives in the history of the bicycle, is the geometric arrangement of the swing axle with the engine mount and the solution for the power transmission at the friction wheel. Wheel circumference, rotation speed, ventilation are further accompanying factors, through which it is possible to build these engines so miniaturized small.

The VELOSPEEDER is no new edition of well-known static friction wheel drives. With fundamentally different design, the VELOSPEEDER is the only e-Bike drive of its kind, that compensates successfully the systemic weaknesses of previous friction-wheel drives.

The attractive engine performance of the miniaturized VELOSPEEDER is similar to the engine power of established e-Bike drives, especially rear hub motors with defined final rotation speed but without limitation selecting a type of gear box, racks and mud guards. The VELOSPEEDER standard motor for light pedelecs, light e-bikes is possible by the clever use of physical principles, but at 1/5 of the weight of usual pedelec drives. The maintenance-free intervals between 7.000-10.000 kilometers (4350-6210 miles) under mixed terrain conditions at least are equal to the lifetime of a conventional bicycle chain. The material properties of the friction ring correspond hard and smooth-running skateboard wheels made of polyurethane.
Installation samples
Contact Form, click here

These factors support the performance of the VELOSPEEDER:

1) the circumference of the wheel, for which the smooth rim flank is an almost perfect low-wear runway,

2) the high rotation speed of the two small brushless outrunner motors (operating in the lower part of their rotation speed load capacity)

3) the open well-ventilated design for heat dissipation with humidity compensation, thermal protection,

4) three different motor design adjustements for an optimal performance among different conditions,

5) the VELOSPEEDER can be completely folded away while driving at full speed - no braking effect by idling friction,

6) due to the calculated adjustement of the rolling process on the rim, the hard-flexible friction ring causes no friction intensive wear

    as with brake pads and surrounding material heating.

7) direct flux of force via short lever arm from the swing axle to the rim without performance-reducing steps of redirection. The discreet
    visibility of the miniaturized VELOSPEEDER is a decision in favor of its efficient functionality. We deliberately give up customer´s wishes
    to make an e-Bike drive invisible.



- Both engines weigh 500 grams - equivalent to 2 pieces of butter.

- Set weight only 1.6kg with electronics and a (standard) Li-Ion battery model B.
- Model B Li-Ion battery (standard) for about 32-38km (20-23,6mi) range
 (193Wh / 22.2V / 6 cell design / 8700mAh / charge time 3h, 3A / 864g).
  An additional battery of this size fits into the standardized bottle holder.

- Model C Li-Ion battery (extended) for about 50-60km (37-44mi) range
 (322Wh / 22.2V / 6 cell design / 14,5Ah / charge time 5h, 3A / 1440g).

- Model A Li-Ion battery (small) for about 15-18km (9,3-11mi) range
 (193Wh / 22.2V / 6 cell design / 6000mAh / charge time 2h, 3A / 528g).
- Battery ranges differ according factors as pedal power, weight, rolling resistance, terrain conditions.
  The maximum tour ranges with battery model C with sporty own contribution during the tour and continuous running engine
  in accordance with a high engine rotation speed is between above 90km (56mi) and 105km (65mi).
- Battery security: we consciously selected Li-Ion instead of Lithium Polymer cells.
- Compact charger with wide input voltage range 90-264V AC fits most of the global electricity grids.
  Electrical power on the input side 70W, closing of charging voltage on the output side 25,2V DC at 3A. 

- We limit the charging current of our charger to 3A for a compatibility with inverters for campervans at 12V up to 100W.
- Independence from public charging stations. 

- The average continuous power output of the VELOSPEEDER is 250watts. (600watts peak power is technically possible.)
- A record-orientated test motor (individual item) reaches 50km/h on a plane test ground (for experimental purposes only).

- The mandatory power output of 250 watts for pedelecs is fixed at the controller as well as the fineadjusting of the drive´s behaviour.
- Limit admissible total weight for solo-bicycles: 120kg (driver, bicycle, vehical load capacity).
- Propulsion (trust) WITHOUT the cyclist´s pedal power: 4kg (40N) both motors / 2kg (20N) each single motor.
  100kg vehicle total weight WITHOUT any pedal power manage an incline of 4%.
  The motors subtract an incline of 4%.
  50kg vehicle total weight WITHOUT any pedal power manage an incline of 8%.
  The motors subtract an incline of 8%.
  With a good pedal power support, sportive oriented cyclists at 85kg vehicle total weight (100kg according motor adjustement)
  manage motorsupported souvereign
inclines on asphalt roads with roundabout double riding speed,
  using appropiately suitable light gears of the gear box, 
pedaling tendentially high frequently, to keep the motor´s rotation speed
  as high as possible - for best efficiency of the motors near their final rotoation speed.

- A rule of thumb in the vehicle construction: The required engine weight is approximately 10% of the maximum vehicle load capacitiy.

  The usual additional weight in electric bicycles of up to 10kg is established as well-founded.

  The undershooting of this rule by intelligent utilization of resources can be realized solidly,

   but requires a definition of the appropriate application range of use
   in correspondance with 120kg maximum vehicle load capacity for a 1,6kg lightweight drive.

  Upgrade information 03/2018

  Customized propietary sine controller extends VELOSPEEDER's range of use

- Whisper quiet engine sound, especially under load climbing mountains 

- Improved elasticity especially in the lower engine speed range

- Precise current control and temperature control for long climbs and steep climbs, appropriate gearshift required

- Battery protection circuit with automatic shutdown after inactivity after end of route 

- Acoustic charge status indicator

  New longer VELOSPEEDER motor type 3135 with 50% more torque replaces the previous slow-motor version up to 20kph

  Individual controller solutions for rehabilitation technology on request.