dogman wrote:What exactly is your battery? And give us a link to where to buy that bafang.
nuevomexicano wrote:kmxtornado wrote:...If it's really in the $1,000-1,200, maybe I'm in the wrong place and e-bikes aren't for me. I just can't help but to think with some sacrifices, something along the lines of an ebay kit might be decent especially since I'm new to this and it's only my first real e-bike. Not even sure if it's really for me.
You get what you pay for. But you're in the relatively ebike friendly city of San Francisco, so why not hit the local shops and ask (beg) around among the local riders/builders for test ride?
kmxtornado wrote: - 24v or 36v? ..... I know 24v gives me more range and less pressure on the motor. It's also cheaper and in turn so will the battery. So maybe 24v? Please share input on this.
kmxtornado wrote:They've been saying the number aH is often times equal to the range in number of miles. So 10ah = 10 mile range. That sounds good. I don't need much more than that.
- 10ah battery
- 24v or 36v? Hmmmm...haven't decided that one yet. I know 24v gives me more range and less pressure on the motor. It's also cheaper and in turn so will the battery. So maybe 24v? Please share input on this.
- 250w motor will get me 16-20mph while 500w would get me probably 18-21mph, right? So 250w's okay?
kmxtornado wrote:BATTERY SELECTION QUESTIONS (from a newb):
What am I getting out of this: http://www.pingbattery.com/servlet/the-8/36V-10AH-V2.5-LiFePO4/Detail
or this: http://www.emissions-free.com/catalog/i25.html
...that I'm NOT getting with this: http://www.bmsbattery.com/36v/183-36v-10ah-lithium-ion-electric-bicycle-battery-pack.html
izeman wrote:ooos. that thread grew faster than i could read
you already saw my ride. and that's exactly what i would recommend to buy. i can easily do 1mi with 10% and pedaling a bit. i know sf's hills and they can be very steep - almost identicall what i have here in austria.
most of what dogman recommended imho is perfect. go for the 500w torque version of the mac geared hub motor but with 9fet controller so you can run 1500w thru it. if you don't plan to do more than 15mi it may be sufficient to go with 2x 6s1p packs of the 8000mah zippys from hobbyking. this will bring down battery costs lot. cabeling will be easier as well. and you can go with a dual lipo charge or a single icharger capable of 10a charging. you may want to check soemother threads about safety precautions on lipo handing, charging and so on ...
you will definetely need some strong torque arms. if you have a friend capable of doing that for you it will be cheaper. i paid $35 for the two i have. stainless steel laser cut. but i'm a techical engineer knowing how to use autocad to make the drawings for the cnc machine.
so to sum up costs:
$400 for mac with 9fet
$150 for the batteries and some cable and connectors
$20 for the thumb switch or any other kind you will need depending of the shifters you have installed
$50-100 for the torque arms - if you don't know how to build them by your own
$100 for the charger
$100 for a proper rim and spokes installed
$50 for a saddle bag big enough for your batteries
those are rough estimates and you may have to add p&p as well as customs as appropriate.
so it IS a bit costy, but for me it was wortlh it.
have fun! (you will, i know *ggg*)
dogman wrote:I've heard good things about the yes kits, more than the good feedback for bms battery. Mostly gripes about bms battery are about slow arrival of stuff. For a small gearmotor, and do go ahead and get the rear one, a 10 ah 36v ping will be perfect. But it will not run a bigger motor later. The frog battery would work fine too. Nothing wrong with entering the ebike world on a budget. But do prepare yourself for wanting a real hill climber later. It's definitely addicting.
Too bad you have such a small budget, there are guys in SF that sell ebikes, such as High Tek Bikes. A few hundred more and you could buy from a guy with local CS.
kmxtornado wrote:Thanks for the response. In that case, #2 is out b/c the cost is too similar to #3. How about #1 though? That BMS price is definitely much cheaper than the Hightek one and perhaps even worth the lack of support. Any words for the BMS kit? I've read that it takes forever and some more to get anything from them shipped. Here and there I've read some people like BMS and some people have had bad experiences. So I guess it's a gamble. But at the price point, maybe it's worth it. Thoughts?
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