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Sticky thread index for "E-Bike Non-Hub Motor Drives"

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Large motors, most common (non RC)


"Bottom Bracket Standards and Bafang mid drive motors" (this post is actually quite useful for many other mid drives too)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=80319

"Lightning Rods mid drive kit" (spinningmagnets, 118 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=57720

"GNG, 1000W 48V BB-drive, $400" (spinningmagnets, 139 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=42785

"New Bafang Crank-Drives [BBS01/BBS02]" (d8veh, 168 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=50104

"LMX P2 : Freeride trials motorcycle frame development" (bzhwindtalker, 19 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=57668

"Bafang BBSHD, 1000W, 68mm-120mm BB"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=68110

Cyclone 3000W
https://endless-sphere.com/forums/viewtopic.php?f=6&t=74166#p1119118
https://endless-sphere.com/forums/viewtopic.php?f=28&t=69867

Various hub motors mounted as a non-hub
"The mid drive hub motor media group"
https://endless-sphere.com/forums/viewtopic.php?f=6&t=38553

"Powered Push Trailers"
https://endless-sphere.com/forums/viewtopic.php?f=6&t=9855

Converting a car alternator into a motor
https://www.youtube.com/watch?v=IKqy3rRWJQE
 
Misc links of interest to non-hub builders

"Wheel diameter to speed/RPM chart"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=16114

calculator, motor RPMs, gear ratios, and wheel speed.
https://electricscooterparts.com/motorwheelgearratio.html

(Hubmotor as a mid-drive, 4 pages) "The Mid Drive Hub Motor Media Group"
https://endless-sphere.com/forums/viewtopic.php?f=6&t=38553

"2-speed systems (R-D, dog-clutch or derailleur changing)"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=8644

"Thuds DIY 2-speed gearbox"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=8644&p=195730#p195730

"DIY 3-speed transmission"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=48731

"Fitting freewheels to splined freehub drivers" (Miles, 25 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=13532

"Strong freewheeling crankset" (full-throttle, 13 pages)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=47618

"Mounting TWO freewheels on one rear wheel hub"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=13862

"Freehub Body Options for Dual Freewheels at the Rear Hub"
https://endless-sphere.com/forums/viewtopic.php?f=28&t=22592&p=329167#p329167

"Fitting freewheels to splined freehub drivers" (26 pages, also info on SRAM dual drive)
https://endless-sphere.com/forums/viewtopic.php?f=28&t=13532
 
A new motor I spotted, let me know what you lot think.

Here are the specs listed at the link below I suspect they are a little over the top in terms of continuous power ratings in hot weather but the specs look good for minimal reduction need. I may get one to test out, I have an enquiry pending to see if I can get more specs like
magnet type?
dynamic balance ?
stator laminate thickness ?
magnet retainers ?
back iron thickness ?
air gap ?
poles /slots?

2016 hot sale MP10850 50KV brushless motor 15Nm toruqe for electric bike, electric bicycles and electric go-karts.

Specifications:
MOTOR: MP10850
KV: 130, 80, 50
MAX POWER: 6KW-7KW
WIRE WINDS:
MAX AMP:150A
ESC: 150/200A
MAX VOLT:18S
NO LOAD current: CURRENT (20V) 1.1A
RESISTANCE (mOhm): 210
SIZE: 108 x 50( without shaft )
Stator: 100*24mm
WEIGHT (g): 1.4kg
SHAFT: 12mm

https://wholesaler.alibaba.com/product-detail/2016-hot-sale-MP10850-50KV-7kw_60536628708.html?spm=a2700.7782932.1998701000.30.LWZT5T
 
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