Very lightweight e-bikes

[mfj197]

you could squeeze the electrics (including 36V 10.4AH battery) in a CD kit to under 5kgs.

Or even less with the right hub drive. 2.1kg for a Q100CST and 1.5kg for the Whoosh 36V 10Ah battery for the Zephyr B for a total of 3.6kg, plus controller and display. If only they did a 260rpm version of the Q100CST ...

Michael

 

[jerrysimon]

and 1.5kg for the Whoosh 36V 10Ah Li-ion cased battery for the Zephyr BMichael

1.5kg for a 36v 10Ah Li-ion cased battery, where, let me at it

Jerry

 

[mfj197]

Here you go - http://www.wooshbikes.co.uk/?zephyr-b . Scroll down, on the right hand side of the page is the spare battery. Thanks to trex for finding it.

 

[jerrysimon]

I may stand corrected but I think that is a typo. I can't believe that battery is only 1.5kg ?

Also at 22kg that's a pretty heavy folding bike

Regards

Jerry

 

[trex]

that battery is relatively small, about the size and thickness of a PC keyboard and felt incredibly light when I took it in my hands. I reckon it has 10S3P arrangement.
The weight comes from the BPM motor, the rest of the bike is more or less standard parts.

 

[jerrysimon]

So each cell is 3.3Ah, do we know what cells they are using ?

I am still using the older Sony Konion 1.5Ah cells for my DIY battery creations mainly because they don't require a BMS. Maybe I need to catch up with some new updated cells.

I guess the motor has some real grunt then, unlike my light assist folding creations

Jerry

 

[trex]

woosh use normally Samsung SDI cells, so price of those 3400mAH cells must have come down a fair bit. The BPM pulls very well, the 52T chainring is also a good touch.