Electrified Downhill bike

[zeropointbug]

That's cool. How much are the Astro motors? What controller would he have used? .......NVM, I searched and found it: $400 not bad!

http://cgi.ebay.com/A123-cell-2300ma...item2a066e4733

I am wondering if these are a good buy? They are obviously genuine A123's, and they are a decent(ish) $8/cell, which I wouldn't mind paying the extra bit if I know what I am getting. I keep thinking $400 is alot for a battery for it, but then I remember that if you would buy a purpose built ebike battery, you are looking to pay $500-$600 for the same range, and then the cells they are no match for an A123 based pack... very inexpensive in the long run.

At least 2000 cycles @100% DOD x 20 miles range = 40,000miles/65,000km Then even after this point, the pack would most likely still be around 80% capacity, still perfectly usable IMO. $400/40,000miles = 1 cent per mile of battery cost over the life time.

[zeropointbug]

Metallover, could you tell me what your ebike consumes in Wh/mile? What speed, and whether you pedal or not?

[PBO]

Originally Posted by zeropointbug

That's cool. How much are the Astro motors? What controller would he have used? .......NVM, I searched and found it: $400 not bad!

To me they look like the 3220 motor?

[zeropointbug]

Could be either motor really? Looks like they have good idle current too, good for an ebike for sure... now if someone could throw that in a hub with a planetary gear drive, you are flyin!

Metallover, okay thanks for the info, but how fast are you cruising at when you get 40Wh/mile? This is for my brother, who says he doesn't need to go that fast, 40km/h (25mph) is fast enough, which I think is the top speed of the Nine Continents kit at ~36V, no?

I asked Cell_man at Endless-Sphere about the 15Ah cells, so a 12s pack should be 550Wh and at ~16Wh/mile that I am seeing kit suppliers say a bike will do at 35-40km/h, should be a good 30+ miles range. The large pismatic A123's are a good price of $2.5/Ah, or $38/15Ah cell,

Have you ever tested at various speeds and recorded the Wh/mile, say, in 5 km increments?