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12th September 2007, 21:22
New hub motor kit - Nano motor?
I've just seen this new kit for sale.
Electric Bike Sales - Shop Online for Electric Bikes, Electric Vehicles and Cycle Accessories - 250 Watt Electric Bike Conversion Kit
Looks quite neat, 4.5kg total weight. Is that the nano motor by any chance?
10 Amp hour lipo as well!
If you pre-order it's £150 off until Saturday 15th.
I wonder if you can over-volt it like my other kit I got from them
I think I'll email for further specs.
Last edited by allotmenteer; 12th September 2007 at 21:25.
12th September 2007, 21:35
It sounds like the Nano, but if so, they have a cheek referring to it as the most reliable kit motor. The grapevine online doesn't agree with that. The Nano roller drive arrangement has been the main source of trouble it appears.
The battery seems a bit tiny, judging by that all in weight, even for a 24 volt.
12th September 2007, 21:47
Yes it is a bit naughty of them.
Originally Posted by flecc
The stated battery dimensions don't seem to square with the photos either.
My 6.8Ah (supposedly) li-ion weighs in at 1.5Kg, and the nano-motor is 2.2kg so I suppose it's feasible to total 4.5kg including the controller, cables and throttle.
I wonder which brands they are?
Some of the biggest and most trusted bicycle brands have decided to enter the electric bike market using this kit on their bikes.
12th September 2007, 22:02
Which brands indeed! If they are referring to Tony Castles Brompton Nano mod, it's a bit of an exaggeration, though I believe some US bikes are using it. A couple of other UK companies are offering the Nano mod too.
Of course, we're not sure it's the Nano, but that weight certainly makes it seem very likely.
13th September 2007, 11:27
Could you explain a bit what the Nano roller drive is please.
Is the nano hub motor different technically to that used in my Torq.
I must admit I like the idea of fitting a kit to my light weight road bike.
13th September 2007, 12:07
It uses orbital rollers driving on a smooth track in the hub shell instead of orbital gears acting on a gear ring in the hub shell like other motors Charlie. This makes it extremely quiet and can add some efficiency due to there being less friction and drag. But of course, smooth rollers have the potential to slip. I've no personal experience of them, but here have been various reports from the USA of failures. That drive gave no trouble to A to B during the Brompton Nano test, nor did it on a long trip from the UK into the continent recently undertaken, so the jury is out here.
We'll have to wait and see, but if you're averse to taking a slight risk this might not be the best choice.
13th September 2007, 14:55
It's now known which kind of problem did have Will Howard's Nano-Brompton on the way to Brussel?
13th September 2007, 15:18
Yes, but I've forgotten what it was Leonardo. I'll try and find where I saw it for you.
However, it was a very minor thing, nothing bad and easily fixed once seen.
The only criticisms I've seen have been in the USA, but of course we haven't had them long yet.
13th September 2007, 16:58
Thank you Flecc. I'd like to know because I'm always tempted by the Nano-Brompton but the reliability issue worries me. Do you know if the Nano-Motor is exactly the same as the Tongxin mounted on the American I-Zip and similar?
13th September 2007, 17:13
If you look here:
Brushless High-speed Motor
you will see what looks like the nano and the name tongxin.
Also some interesting prices, provided you buy hundreds.
And get it all here straight from the horse's mouth: CHINA HANGZHOU ZHEDA TONGXIN ELECTRIC CO,. LTD.
Nice sound effects too, and English translation.
Last edited by rooel; 13th September 2007 at 17:17.