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    Novel gear reduction strategies

    https://youtu.be/AEzJfPi7jzc AEzJfPi7jzc I was having a late night look at various gear reductions and came across that beauty. Gears are difficult for a home machinist to produce and any inaccuracy leads to a lot of noise. They also require a rather "clean" environment to run effectively...
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    Forum name

    Perhaps we should call this one "parallel mid-drives" (LMX, Boxx) and the other forum "serial mid-drives" (almost everything else) to differentiate between how the power arrives at the back wheel. Then move anything light motorcycle related (Sur-ron, Cake, etc) into the motorcycle forum with the...
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    'lightest.bike' 1.7kg 1000w mid drive

    https://www.lightest.bike/ If this isn't Indegogo vaporware it could be a total game changer in the DIY arena.
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    What aren't there threaded li-ion cells

    I was thinking about the larger formal cylindrical cells like the QB26800 and it occurred to me how great a pack of those would be if they had threaded terminals like Headway cells. I understand that it would add weight on a per cell basis so wouldn't be ideal for smaller formats, but we are...
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    AWD handcycle.

    I've just spent a day exploring with a friend on her off-road handcycle (proadaptive XCR). This is a front wheel drive delta trike using a BBS02. The chassis (and rider) are extremely capable but a few issues really limit her ability to tackle harder terrain solo. The first is that they supply...
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    New tech!!

    https://techcrunch.com/2019/03/26/linear-labs-next-gen-electric-motor-attracts-4-5-million-in-funding/amp/ This came across my news feed. If they can hit the promised numbers it could be amazing. Plus they want to market direct to customers at a size suitable for ebikes/light motorcycles. -Grant
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    DH frames for freeriding

    Given that peddling isn't as huge a consideration with a powerful (+2kw) mid-drive, is there any reason to not choose a DH frame (~2005-2010) as a general freeride build? Is the slack geometry that much of a problem? Keep in mind my background is enduro motorcycles and a little trials thrown...
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    Reversing a Cyclone

    Has anyone run a cyclone in reverse? Did you have to re-time the halls or anything? I'm not concerned about the freewheel in this application. Thanks, Grant
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    Multiple BMS

    I've purchased a set of 10 Swagtron hover board batteries to power my ebike build. These are a 9s1p 2.9Ah pack with a BMS that handles charge, discharge and temperature monitoring. My initial plan was to run 5 of these packs in parallel then wire the two "bricks" in series for 66v nominal. I'll...
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    Hub as friction drive

    Anyone tried mid mounting a small diameter hub and running it as a friction drive? Not that I'm seriously considering it, but it's an interesting concept.
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