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The advantage that the cyclone has over hub systems is it can use the bike's gears i.e. like in a car to get the best efficiency at any particular speed. Hub systems with gears basically have only one gear! The disadvantage of the cyclone I believe (for my uses anyway), is that it always...

Just a quick warning folks. Right now the Suzhou Bafang website is infected with some nasty drive by viruses and trojans... Don't go there without a fully patched computer and up to the mark virus protection, and even then be very carefull! Best avoided until google marks it as clean...

John, that was my next question! How do they vary the power? So they pulse it at different duty cycles. Makes sense. (I should know all this really, my dad used to supply power thyristors to drive electric trains and cars. Tut tut). So the logical next question after this is, how much do...

You mean Spanish? :D

Ahh I see! I was making it WAY too complicated! So basically the pulse from the hall sensors triggers the controller into the next step state. I was thinking it was more like the AC motor you describe. (I come from a digital world!) So these controller things are not as complex as I thought...

Interesting.... I'd seen some posts here saying that it wouldn't work, due to the smaller length of chain between the cranks and cassette, which means that with the additional fixed point of the motor that there's not enough play in the chain for the derailleur to work. Obviously not! Wow...

I suppose this is down to the design of the controller then. I was envisaging a "crystal" controlled oscillator. Where the frequency (& hence speed) of the state changes was fed from a voltage independent source. However if a voltage/power controlled oscilator is what's used then >voltage =...

Nick thanks for that info. BTW Where does the rotational speed of these things get set? In the controller? I.e. what tells the controller that you have a 20" or 26" wheel so it knows how fast you are going (from the hall sensors)? I suppose where I'm going with this is, if I were to get a...

Sorry if I'm being a bit thick here. But does >voltage = >speed with the BRUSHLESS motor types? As far as I can work out it doesn't necessarily.... Why? Well with a BRUSHED motor the more energy you put into the windings the fast the motor moves onto the next set of contacts, which then...

Errm, yesss very ES. Forgive my lack gusto here but... unlikely to fit on the tube is it?!? + I don't have the light plane either! ;-) I'll have another look at crystalite though. But to answer my original question, do you have any experience of the 20" Alien kit (24V 250w Bafong) on the...

Hi Nick, Thanks for your help... >1 in 5 can be done, but not by all bikes. If I were in your situation, I would >still be looking for a bike that could do it, and that means: >Low gearing / small wheeled hub motor, So something like the hub for a 26" wheel built into a 20" wheel...

Well a quick google says that in it's steepest parts it's a 1 in 5! Actually Highgate Hill is at the end of my route (my flat is at the top!). So I'd probably walk that bit just to get the exercise (My knees actually respond better to walking than cycling), + there might be a toddler strapped...

Hi, I've been lurking around for a couple of weeks and thought it was about time to post. I haven't got an e-bike yet but my plan at the moment is to get a Dahon Speed D7 and convert it with an Alien 20" kit or Tongxin. The reason to have an e-bike is to allow me to cycle again with my...