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Thread: Bakfiets w/ e-assist

  1. #1
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    Default Bakfiets w/ e-assist

    Hi, all. I've posted with questions about hauling me, two kids, and our gear, gotten lots of good advice, but still haven't made a decision. I'm now leaning toward a bakfiets with e-assist and have been in touch with Workcycles, which quoted me approx. 4200 euros for their Special Edition Kr8 bakfiets with "Nuvinci, Magura HS11 handbrakes front/rear, LED-lighting f/r. RAL6018 fenders, escape hatch, cable
    tunnel, fork. Incl black panels, Fr8 rear carrier, green box cover and black canopy with green rear wall/window, ventisit cushion on bench."

    Any thoughts? Seems like a good deal, especially with the dollar doing relatively well right now, but would love the experts to weigh in. I've read through the forums and contacted some U.S. distributors, but it seems like having this thing shipped from Netherlands would actually be cheaper. Thanks!

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  3. #2
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    I'm leaning towards a WorkCycles kr8 as well, but it seems like the e-assist might be tricky to order straight from the Netherlands, due to the lithium batteries.

    Does anyone have experience with getting an aftermarket e-assist installation for a bike like that?

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  5. #3
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    Quote Originally Posted by Guus View Post
    I'm leaning towards a WorkCycles kr8 as well, but it seems like the e-assist might be tricky to order straight from the Netherlands, due to the lithium batteries.

    Does anyone have experience with getting an aftermarket e-assist installation for a bike like that?
    Hi Guus, I also live in Arlington and have a bicycle that I converted to a pedelec with a mid-drive motor that I use to tow my 2 year old daughter in a Chariot bicycle trailer on trips to MOM's grocery store or to the park. I read on the Endless Sphere forum that someone converted their Bullitt cargo bike with a Tongsheng TSDZ2 pedelec motor and they reported seeing the same motor fitted to a passing Workcycles kr8. This motor is the same as the rebranded Schachner MM15 motor used for Workcycles pedal assist conversions. There is a 40 page thread on the ES forum about this motor. I think the TSDZ2 looks like it would be a suitable motor for a cargo bike on Arlington hills. According to the manufacturer website it is designed to fit into a standard 68mm bottom bracket, and while I can't tell if the 42T chainring fits in the Workcycles full chaincase I suspect it does. The 48v battery is connected to a 15a controller which would give a peak power of 720w, 80NM of torque, and limit the top speed on the flats to under 20mph, the Biktrix website suggests their's is speed limited to 25kmh/15mph which is plenty when carrying kids. That power rating would meet the definitions of an Electric Power-Assisted Bicycle in Virginia and a Motorized Bicycle in DC so you could legally ride it on bike lanes and PBL's on the street in Arlington and in the District, and on the Custis and 4MR trails in Arlington. I have not used the TSDZ2 motor but my similar Bafang BBS01 motor has a peak power of 648w that is sufficient to power my rig which weighs 300lb fully loaded with me, daughter, and groceries at a speed of 9-14mph up the steepest parts of the Custis Trail.
    Last edited by Dewey; 08-18-2017 at 01:05 PM.

  6. #4
    DismalScientist is offline I really need to log off the internet and go for a ride.
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    Anyone know where I can get an 80T 5 bolt chainring?

    Just asking for a friend.

  7. #5
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    Quote Originally Posted by DismalScientist View Post
    Anyone know where I can get an 80T 5 bolt chainring?

    Just asking for a friend.
    You should probably tell them to cut and weld two 55 tooth chainrings into one massive oval chainring. You know, for moar power.

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