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How odd. I wonder if it is a typo on Argus' part? Putting "Raleigh Powabyke" into google gives no results. I would worry about that one cutting out on hills if you didn't pedal!

Sounds like you know what you are doing! I believe you are wise to go for the more standard set-up with Hall sensors.

Yes, good point - I'd forgotten you were building your own controller, Honk. If it's not giving you enough speed, you can probably tweak it pretty easily to up the power.

John, I'm impressed - well spotted, you don't miss anything! But watch out for those German imports, they're a load of rubbish, completely different - honest, the wheels will fall off, you're bound to have wired them up wrong... - no sorry, I've got the wrong thread!

Yes but I still think it is the air resistance, because when I go into a strong headwind, these figures scale down to below the motor's revs limit: Me + motor only gives 16mph. Motor alone maybe 14 mph Me alone, say 8 mph

Honk, I've just been thinking about your post a bit more, and wanted to spell out that I think 10mph from you + 10 mph from the bike wont give you 20mph! It'll give you something nearer to 15 - because air resistance increases significantly at higher speeds. For example, I can pedal my...

Griz, I think your example is a good illustration of the Tongxin having quite broad limits of application. A normally geared one is clearly coping fine with Welsh hills. I researched the Tongxin quite a bit before I bought it. I found a fair bit of evidence of controller problems but...

Flecc, Thanks for your comments. I think we agree that the Tongxin, like lithium batteries, will work fine if its limits are respected (like most of us probably!). The question then is to define what those limits are, and I feel they may be broader than your conclusion implies and that the...

It's quite a good comparison because both of these problems arise not because the Tongxin motor or Lithium batteries are somehow bad, but because they are misused in the wrong application: too much torque expected from a Tongxin or too much current drain from a lithium. Respect those...

Honk, From my limited experience (my controller failed on the second test ride and the second one is still on its way from China), I think you'll get good performance. I would be very surprised if you have any motor slipping problems - the Tongxin generally performing well in high speed...

About 15 years ago I did some work for someone who bought a chain of costume jewellery shops called 'Torq the Jewellers'. I don't think they're still around... Frank

Hal, Flecc, Thanks - I'd assumed that it couldn't be done but I'll be getting one now! One thing Ezee have done that is really clever is to put the throttle on the left. I can't understand why no-one else seems to do it, for UK bikes at least. Throttle, gears, main (front) brake and...

They're cheaper than that now, Jimmy. In case you haven't spotted it, Wisper is now selling off new ones (ex-display) for £4-600 on eBay.

Maybe the ebay ones are "German" ??

Nine continents is not a bad idea. It's a good price for what looks like a nice kit. Thanks for pointing it out, Leonardo If you want a Suzhou Bafang motor then send them an email Let us know what they say! Alternatively I have a hunch that this UK seller is using this motor The...

Can you fit a bar end mirror on a bike with a twist throttle? How? Frank

Doug, I don't quite know where to start! You make several points not consistent with postings on this forum - including in this thread and made by yourself in others, emails I've sent you and evidence from the wider e-bike body of knowledge on torque arms. I won't go through...

Unfortunately not a simple answer! Forces pushing the rider forwards are: Motor power Pedal power Forces holding him back air resistance rolling resistance of tyres other frictional resistance At higher speeds air resistance is the main slowing force so the speed mainly depends on...

Great news - well done!

Based on the AtoB write up of these from a few months ago, which I posted recently, I would guess they're not yet official Raleigh imports but that there is a chance they may be soon. Tim - is that not what trade shows are for? If I were going to buy one of these (and they are pretty...