Engine history

Contents

Type history

Recording the history of Stromer motors is difficult due to the variety of models, new editions of older models and various special editions. myStromer AG uses brushless BLDC motors. BLDC stands for 'Brushless DC Engine'. In the course of the model's history, motors from various manufacturers were used. All 36 V motors were 'off-the-shelf' motors, without specific Stromer engineering.

BionX

Motors from the Canadian manufacturer BionX were used in Stromer models in the start-up phase from 2009 (Thömus Twinner). BionX went bankrupt in 2018. However, service and maintenance are still available from bionx-service.ch.

A Post from Stromerforum.ch sheds light on the beginnings:

Quote @bluecat from stromerforum.ch: ...the BionX kit and bikes equipped with it were available on almost every corner. At Thömus they were at the back left of the sale and demo bikes for quite a while. I think it was more the case that Thömu Binggeli, Magnus Almgren and Dominic Isenschmid realized that it wouldn't work that way - and then designed the Stromer. Perhaps BionX was asked if they could supply OEM. In any case, Ultra Motor became the supplier - perhaps they had also built for BionX, as the firmware contains display codes that were also used by BionX. Later, the now active myStromer AG took over the firmware, while Ultra Motor Asia probably merged with TDCM. Ortlinghaus then showed that it was also possible to build a highly respectable motor in this country - and myStromer AG developed the ST2 motor. GoSwissDrive on the other hand seems to oscillate between insolvency and MBO, Specialized has given up its turbo...

People and definitions

Thömu Binggeli: Founder of myStromer AG
Magnus Almgern: Industrial Designer, Thömus AG
Dominic Isenschmid: Product Manager, Thömus AG: 2008 - Dec. 2009 | Product Manager and Co-Founder 2009 to May 2019, myStromer AG
Ortlinghaus: Leading specialist in the field of clutches, brakes and discs - including hydraulic power units and regulation and control units.
Go Swiss Drive: Subsidiary of Ortlinghaus. Was dissolved at the beginning of 2019. Since then, service and spare parts for GO SwissDrive wheel hub motors have been provided by Ortlinghaus-Werke in Wermelskirchen and - for Swiss customers - by Ortlinghaus GmbH, Gams processed.

Ultra Motor

From 2011, the V1 (later called ST1) was available with the M25, M33, P48 and S55 engines. These came from the English company Ultra Motor Ltd. In November 2011, Ultra Motor filed for insolvency. As a result, Ultra Motor's drive development division (Fast4ward) was spun off as an independent company based in Taiwan in February 2012. The A2B bicycle brand ended up with the Indian company Hero Eco (New Delhi, India), one of the largest Two-wheeler manufacturer the world with an annual turnover of over 5 billion dollars. TDCM (Taiwan Direct Current Motor) also made an early appearance. The Thömus V1 already had motors from TDCM, among others. These were 36 V/500 W motors.

A groundbreaking development took place in 2014 with the launch of the ST2, a 48 V model. Stromer developed this together with the Bern University of Applied Sciences (CH) and the mentor at the time, Prof. Dr. Andrea Vezzinithe hub motor still used today. The motor electronics were outsourced from the motor, the design was patented and TDCM still manufactures the motors as an OEM today.

ASI

Motors from Accelerated Systems Inc. was available for the Stromer ST1 M33 / P48, the ST2/ST2 LTE and the ST2S built in 2018, among others. Conversion kit from ASI to TDCM engine to. Stromer Art. No. 401833 / € 2'423.

TDCM

The Taiwan Direct Current Motor has been equipping Stromer with hub motors for many years. The beginnings probably go back to 2010. They are based on a patent from myStromer AG and have been continuously developed in terms of torque and power over the course of the model's history. The serial number shows the year of manufacture of the TCDM motor: S11-XXXXX > Series 2011; E13-XXXXX > Series 2013; ...E18..... > Series 2018

An attempt to document the history of the engine can be found in following table to see. The table can be commented on for additions or error corrections.

The patent

Stromer advertises its decision in favor of the hub motor as follows:

More thrust
More dynamics
Less wear in the drivetrain
Maintenance goes to 0
Recuperation possible
More elegance
Almost inaudible
More security
More range

All in all, this means for Stromer More fun!

The concept of the Stromer hub motor was developed by Stromer patented.

Patent dispute

June 26, 2023: At the Eurobike in Frankfurt escalated a patent dispute between myStromer AG and its competitor Opium (Revolt Zycling). Opium's exhibition stand was cleared. myStromer AG complained about the mounting of the thru axle with thread in the right dropout. More details are available here.

August 8, 2023According to velojournal.ch Opium worked on a revision of the torque support.

March 24. 2024: How velobiz.de reported, the legal dispute is said to have been settled by means of a settlement between Revolt AG and myStromer AG.

Quote:

The proceedings before the Unified Patent Court were settled in February 2024 after Revolt Zycling AG acknowledged the infringement claim. myStromer AG had also sued Revolt Zycling for design infringement.
As myStromer explains: "As part of the settlement, Revolt Zycling withdraws the nullity attacks against the Swiss and European Stromer design filed in response to this lawsuit. MyStromer also grants a design license to Revolt Zycling for the frame design of certain bike models."

Links

> In the American Endless Sphere forum there is the thread "Hacking a Couple Stromers" which provides a deeper insight into electric motors.

> Stromer ST1 no_comm. Upgrade to 52V and Phaserunner controller

> Stromerforum.ch - Threads

Updated on July 18, 2025

Was this article helpful?

Yes No