20in hub-motor-specific suspension fork for yuba supercargo? I need this bike to have more power but also regenerative braking, and hold traction better on bumps (currently the motor skips/skids slightly on every bump and crack when climbing.) And it needs about 1000W braking power but 350W is enough assist / for tractionary reasons, I need to send any more power than that to the rear wheel & where it can shift gears. #CargoBike#eBike#SuperCargo
Adding a gmac hub to the rear wheel is about the only off-the-shelf option I've got right now (is kinda what I initially planned) but I'm not sure about adding 10-12lb to the rear, where I'm often lifting the tail of the bakfiets to pivot and park.
@enobacon You could drop the front motor and replace it with a mid-drive bafang, instead. That would provide tons of power and allow you to have whatever front suspension you want.
You'd still have to add a rear gmac motor for regen braking, though. But maybe gmac/grin has lighter, less powerful motors that you could use to ensure the back end remains light? The mid-drive motor would be your pedal-assist, and the rear hub motor would be throttle-controlled and with regen braking.
@Andres4NY that's the opposite of the direction where I'm trying to put the weight though 😂 The 350W motor with some thrust bearing mods, or the EZ - I don't like the axle end cable though, or how the big flatted shaft misaligns the disc pads vs 10mm round, and I have doubts about a suspension fork crown vs the cable steering, IDK if the slight rise/trail change would matter to the handling but a torque arm would prob be fine. The all-axle motor isn't geared, so IDK how that brakes. got a tsdz2
@enobacon mid-drive motor weight is pretty well-distributed on a bakfiet/longjohn (at least on my two), so long as you're not sticking the battery towards the back.
@Andres4NY I mean I wouldn't do a mid and rear (except I might do that on the xtracycle) so unless I can get braking into the front wheel, I might need a different umbrella bike solution for the xtracycle / madsen or something to haul drum+bell kit + middle schooler backpack - sized cargo on the tandem. And the bigger 2 out of my 3 passengers prefer that rear seating so this bakfiets project is not well-loved, but riding it is so much nicer for groceries/boxes and/or rainy days.
@Andres4NY I've also got most of a bbs02, that should just need a controller, but I don't think I want it hanging down so far / so much skid plate vs tsdz2. I'm also stuck on the brick battery that I'll need to shave down or something, might have a mounting spot option directly behind the front wheel.
@Andres4NY I was going to put it in the front cell of the ladder frame, but without taking a couple smidges off each side, it would have to sit vertical in the diagonal portion
@Andres4NY I maybe should just get a few of those with extra interchangeable bases and not try to build the 20Ah brick into it. I hate the swivel-cover 3-prong charge port on the one I've got on the tandem though. Does it have a fuse inside the case? The old dolphin ones had a rubber cover, fuse on the outside, I would stick to that format if I could get modern cells in them.
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