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Hey Daox,
I built this ebike for about $600 (see attachment). IMO it has a lot of advantages over a hub motor ebike like
1) You can shift gears to get the best use of the motors power
2) You can pedal if you want but you don't have to
3) Top speed of 25 mph
4) 20-25 miles of all electric range
If your interested in more details let me know. You could do this with your motor but, you will need more cells. 175W will be nothing and even 350W is severely underpowered. I'm running 500W and I still want more. I would really like a 36V/1000@ motor but its just not in the cards for now. I'm using lithium (LiFePO4) batteries as well. My pack is 24V/30ah and it is sufficient for my 17 mile round trip commute.
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