Semcon Develops Low Cost Motor That Makes Any Bicycle Electric


Bicycles are becoming more and more popular these days as many people are focusing on physical fitness, and due to increasing traffic congestion, roadwork, and green consciousness, people are more compelled to get on a bike.

Fully electric bikes, or bikes with even some minimal electric assist are rising in popularity as well, but are expensive. Kits are available for conversions, but again they are typically expensive as well as difficult to install. Semcon has come up with a solution.

semcon bike motor 2

Semcon Electric Bicycle Motor

Semcon’s new smart bike motor prototype is inexpensive and simple to install on most all bikes. Anders Sundin, Technical Director at Semcon explains:

“The needs and wishes of the typical cyclist are what got us started. The benefits of the electrified bike are obvious, but existing solutions are expensive and complex. That’s why we developed an engine which is compatible with any bike and easily shared among friends and family,”

The motor is small and can be carried around by the user. It weighs around 1 kilogram (2.2 lbs.), and packs 150 watts of power. The motor is set up with pedaling detection. The system will engage to assist the rider between 7 and 25 km/h (4-16.5 MPH). The company’s hope is that the rider will experience a more comfortable ride that is still at safe speeds.

Semcon’s bike motor is also “smart”. Inside is a tiny computer with the software. It will also be possible for the user to add apps to the system in the future. Semcon hasn’t developed apps as of yet, but the apps could be anything from setting speeds or range, to GPS tracking and theft control.

The prototype motor is not currently being sold, however, the company is actively looking for investors to buy into the product and make it available in the open market. The price will be under €100 (under $150).

Source: Semcon

Categories: Bikes


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20 Comments on "Semcon Develops Low Cost Motor That Makes Any Bicycle Electric"

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The principle isn’t new really. Assisting through tire is cheap and easy but isn’t efficient and best solution.

150 watts won’t really gain you much either, especially once you consider it’s not that efficient to begin with…

I dunno. I may pull the trigger at some point. 150 watts would definitely flatten the hills for a ~200watt rider.

It’s the integration, and resistance you point out. That’s where if it can’t disappear when you aren’t engaging it, it isn’t worth it. It would be good to have “on the fly” engage/disengage of the little wheel. Maybe it does?

Yeah, I’ve been looking for assistance at around this power level. I’m interested in what the reviews are after it gets into production.

Many everyday rider barely put 150 watts of power into their pedaling.
So, in any case, 150 watts is a lot.
A very good rider can give 250 watts for an hour, if you add 150 watts to get to 400 watts you put him at the top pro winning rider.
I would say It’s a lot of power!

Have fun truing your bicycle wheel with two points of resistive contact instead of one. Long ago, I had a bicycle light that ran off a generator that was attached to the rear wheel in the same fashion. I found the resistance to be very annoying.
Why they wouldn’t put this in as a forward crankset replacement baffles me. That is a fairly modular location and it benefits from the gearing mechanisms, which this motor does not. Oh well, I’m not about to tell them how to design their product! Oh, wait…

Installing a forward crank set replacement is much more effort than bolting this on.

I agree, it is trivially simple to attach to the seat tube like that. More people may buy something they can attach themselves, but that doesn’t make it good engineering. Capitalism over sense.

More e-bike coverage, please!

These are EVs just as much as any Tesla.

Because of their affordability, I think they’re even more relevant.

(Anyone know of an e-bike site similar to this one?)

There are a bunch of ebike sites out there depending on what you are looking for. has been around forever for diy.

This one looks at higher end diy

This guy look at newer bikes.

There are a lot more resources if you are interested.

150W is pathetic but better than nothing.

What is really pathetic and MISSING from the entire article is the battery capacity, which judging from the pictures, has to be paltry.

i agree with Djoni, 150 Watt is really not bad – this is not for the tour de france. i agree with potential high friction and potential slippage when wet

As a guess, ~150 Wh. Enough for an hour of assist.

Electric bikes already exist. There’s no need to wait for a prototype system (in who knows how many years) that will be tested by buyers when all the while electric bikes are for sale in most major cities.

Those aren’t e-Bikes.

They are Hybrids!

/end of BEV nutjob role playing

Yeah, but it’s biofuel.

Doesn’t matter… Hybrid is still hybrid, doesn’t matter if it is run on E100 or E85 or E10.

In fact, that “bio fuel” are generated with some of the dirtiest overhead required to keep that bio and fuel part going.

Just in case you didn’t get it…

Human power are some of the dirtiest power on the planet when all the energy and resources required to keep that human alive are included.

Yea, their FART alone is 9 million tons of CO2 annually.

The VEGANS are the worst of the lot.

What they need to do, since it has pedaling sensing, is to add regenerative charging for those downhill runs.