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  1. T

    Rad Power Batteries are now UL certified and fully potted

    I have one of those batteries under the boom of an HPV FS26 powering a Phaserunner and MAC 10T @ 40A. I fabricated a locking slide mount rattle free and stout yet only 340 grams. Its gets stressed. 180 Charge Cycles so far still at 97% State of Health. Its a keeper. And looks really cool -...
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    Up grading to a new trike

    Take a peek at HPV's new delta. Ergo its an HPV and its a brilliant package. And it folds. Hase makes a great product but the Delta TX may tick all the boxes and some. https://www.hpvelotechnik.com/en/recumbent-trikes-bikes/delta-tx-comfortable-e-chopper/
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    Pinion Motor Gearbox Unit

    New kid on the block. Pinion 12 speed mid drive with 800W Peak motor @ 9.0 Lbs. Not gonna be cheap or aftermarket.
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    AWD Trike, motor load on hills, setup?

    Efficiency and weight. Mid Drive runs most efficiently across the speed range. Trouble with a Mid Drive is you lose half the gear range by losing the front triple ring. Nice thing about a trike is with chain tubes you really don't need a front derailleur to shift, and most aftermarket Mid...
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    Edit: GMAC in stock now

    I happen to have a MAC 10T 26" rim + 10Spd Cassette with a Phaserunner, CA3, Thun Torque Sensing Hub sitting on a shelf that needs a new owner. It has about 1000 miles on it and is in great shape. Cabling is custom length for an HPV Scorpion FS26. I paid over $1000. $500. Send me a PM if...
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    Bafang mid-drive as generator?

    The motor will operate as a generator with proper mods with clutch and motor driver software. Its been done before but not very efficiently.
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    Parallel battery for extended range, is it safe?

    Not recommended as the different BMS's may have some oscillation between weaker/stronger cells. Can leak smoke under extreme conditions.
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    DC to DC Solid State Relay (SSR)

    Luna used to carry an SSR but I can't find it anymore. I have 3 of them. The first one blew when the 52V charger spiked > 60V once. Bought a second and they sent me two (warrantee). So at least I have a spare. Always disconnect battery ahead of SSR before charging; it seems that even very...
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    Hub Motor Rewinding! Help!

    Placing sensors as close to zero-cross as possible. It helps to have a timing light. I modified a spark timing light for that some years ago but not for bike motors....
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    MAC motor worth it?

    That is very close to my experiences with the early Gen 2 MAC 10T I have from late 2016, it's on a Scorpion FS26 trike with one of the earlier Phaserunners, I think 2nd production batch. Previously ran with a Gen 1 MAC 12T. About 7500+ miles to date, no problems other than a battery...
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    Avid BB5 vs Avid BB7

    True although with the caveat that some are far worse than others. The OE BB7's were loud enough to get the attention of earbud shod pedestrians ahead; sometimes its even amusing in a cruel sort of way. EBM pads aren't always silent but they don't startle folks either. Chalo is right about oil...
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    GMAC 10T replacing wheel bearings (How many, what type, what size?) Please help. Thanks.

    I've been playing with MAC's for about 7 years now and just noticed this thread. The OP pointed out he had 11,000 miles; planetary bearings (think 55,000 miles @ 5:1) had plenty of wobble with teeth sheared at the roots. And its a GMAC. Teeth shearing near the roots comes from fatigue which...
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    Avid BB5 vs Avid BB7

    BB7 has larger pads and pad position adjustors on both sides. OE BB7 pads squeal, not sure about BB5.
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    Rear cassette. How big can I go?

    Building a Wild One 20" with BBS02 and found this thread relevant to the lessons I'm learning at the moment. Had a Shimano XT 10 spd DER Med Cage on hand. Only handles a 36T max with 39T Chain Pull. Added an 11-40 10Spd Microshift AdvantX Cassette and Risk Extender. Reaches 48T just fine with...
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    Off the line torque - DD motors

    Sort of but you're all missing the key points. Efficiency. At zero RPM the efficiency is zero. Its just a heater at that point. As motion begins, efficiency increases from zero. Think in terms of the frequency of shifting poles as the motor rotates. Once a more efficient frequency is...
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    What Would You Build?

    Select a trike. HPV Gekko 20 is great rigid frame candidate. I gather you want simple yet a full range of gearing, as you will loose the front derailleur with a Mid Drive. Easiest to install is the Golden Magic Pie Edge Hubmotor with throttle only. Controller is integrated in the hub and...
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    Transporting heavy ebikes - show me your solution

    I've got a Swagman Hitch Rack hanging in my garage free to anyone who wants to pick up. Not shipping or any of that. Tucson AZ, send me a PM if you want to pick it up.
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    leaning trike cargo bike front end kit

    Its a nice layout with proven results. Monoshock is similar to one I'm modeling for a tilting scorpion without the ARB Gizmo.
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    Custom 3d printed battery mount

    Recumbent battery mounts always take a bit of creativity, nice job.
  20. T

    NYC battery fires and damage

    Ergo, UL/CE certs are optional, not required to sell by law. Insurance Companies drive the requirements as you eluded to. Yes, UL has Test Standards along with a facility dedicated to batteries. It takes a budget of about $20,000 to prep and run through a the test cases and get certified...
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    Em3ev no longer selling Mac Motors

    Try ordering directly. May take a bank transfer for payment. http://www.macmotortech.com/
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    Phaserunner Vs. 40A Grinfineon (10T Gmac)

    It's also dependent on the efficiency zone of operation as well. Infineon Trap Wave at 40 Battery Amps from a standstill my Mac could spin the wheel on launch with 90 Lbs weight on it, guessing in the range of 80-90 ft-lbs torque. That gets into accelerated gear wear territory. Nylon gears...
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    My first ebike build: custom-built KMX-based electric velomobile

    Sorry to hear about the spindle failure. Heard that KMX was scarce but thats about all I know. They sure aren't getting any cheaper, just saw new Ti-Fly 20, Rohloff, Shimano Mid Drive, decked out, MSRP $15K. Zack Kaplan Cycles in case you just won the lottery. Too slow, but it's amazing folks...
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    My first ebike build: custom-built KMX-based electric velomobile

    This is one of them from 5 years ago; it's been updated with a Wolf Battery and relocation of components since. At 5000 miles did a motor teardown. Replaced clutch & gears since I had spares but they were still had at least another 5000 miles left on them...
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    My first ebike build: custom-built KMX-based electric velomobile

    Recently graduated to the Speedgeezer Class, an old man with an E-Trike...... Been tweaking the trike(s), Scorpion FS26 with various drives for 6 years now. Started with Catrikes, but found they weren't getting any awards with velocity and bumps and upgraded to HPV. Test rode Stein, ICE...
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