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  1. #1
    Newbie
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    ISO advice: Dahon folding bike + Bafang BBS02. Good idea?

    I'm seeking advice on converting, potentially, a Dahon folding bike using a Bafang BBS02 kit, either the 500W or 750W option. I haven't purchased either, but these are the bits I've tentatively settled on after doing some research.

    My current idea is the
    Kit: BBS02 750W with 50V, 19.3Ah, 5A rectangular package (since the Dahon doesn't have a triangular frame)
    Bike: Dahon Speed D8

    Please NO speed nannies. I know the laws in my city and I take full responsibility for the 750W, if I go that route.

    Anyway, my skill level WRT bike maintenance is basic. I've changed out pedals, put bikes together that came in pieces, changed out brakes, that sort of thing.

    I'll be mostly riding in city, with steep hills, but I'd also like to take longer rides of on country roads, paved.

    I need decent power for the hills, but am concerned about burning out the battery or controller. I'd also like to have enough charge for longer rides.

    I am thrown a bit by the question on EMBEV about whether I want to order with or without a 44 tooth chain wheel. I'm clueless about how to tell how many teeth would be correct for the bike. I believe Bafang sells other sized chain wheels, but no other are offered with the conversion kit.

    I assume I need the rectangular battery pack since the Dahon doesn't have a triangular frame.

    I'm worried a bit that the Dahon has too much aluminum to really be strong enough for either a conversion at all, or for the 750W kit. What components should I consider changing out?

    Am I totally nuts thinking this will work with a folding bike?

    TIA!

    ETA: I did search here and found info on BBS02 and Dahon, but not together.
    Last edited by nfolsom; 03-02-15 at 04:14 PM. Reason: Edited to add info about searching.
    - Nancy

  2. #2
    2 wheeled soul
    Join Date
    Mar 2015
    Location
    Ahipara, Aotearoa (NZ)
    My Bikes
    lots of bikes from fully suspended retro Klein Mantra Pro, a titanium Airborne roadbike, a rebuilt Ti Cove Hummer, 2 folding bikes (dahon & copy), to a Buell and a BMW :)
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    FOLLOWING! Hi nancy, you sound similar to me wanting to convert a dahon (well it's a very well made Dahon copy with SRAM gearing and top end components). I don't know much about the a conversion kit you are mentioning so i will go and research, but the alloy is pretty durable. I wouldn't take it on a world tour (tho some have), but only b/c its alloy. I hope you sort out your kit! Running 20in wheels I imagine? Is the kit you are looking at with a front wheel hub motor?

  3. #3
    Newbie
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    Quote Originally Posted by nfolsom View Post
    I'm seeking advice on converting, potentially, a Dahon folding bike using a Bafang BBS02 kit, either the 500W or 750W option.
    Hey, how far did you get. I'm planning on doing this with a Downtube Nova. It is an aluminum frame as well.


    Pete

  4. #4
    Senior Member
    Join Date
    Oct 2014
    Location
    Israel
    My Bikes
    Italwin eLight (20" folding ebike)
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    Regarding the fact that the Dahon is a folding bike, let me tell you about the ebike I bought a year and a half ago:

    It's a folding 20 inch bike that's made of aluminum. I don't know how much of it is aluminum, but it's kinda light. It's called the Italwin eLight. Here you can see what it looks like: http://evelon.com/wp-content/uploads...win-elight.jpg

    The bag contains the battery, and the motor is a street legal 250W 36V one. The bike does 31kmph (19 mph) on flat roads, and 35kmph on average downhills. I managed to go as fast as 55kmph on a steep downhill once. It lasted just a few seconds, so I can't comment on how safe it is. My point is, though, that electric folding bikes do exist. The BBS02 should do about 45kmph if I'm not mistaken. With good tires, say Schwalbe Big Apple or Big Ben, for improved grip, I think it should be OK.

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