I have one (BikeE) laced radial on the non-drive side and it is fine. I was misremembering that it was radial on both sides. The drive side on both my BikeEs are 1 cross pattern and the one without radial lacing is 1 cross on both sides. It may be necessary to use a drill to angle the rim holes better to avoid bending the spokes and stressing the nipples (which break under much side loading).
The hub motor I am familiar with is a MAC (handy because of internal gearing) and it is a large diameter hub. there are probably smaller, lower torque producing motors. It is torque you are after in the long run. You want to get some help starting up on inclines. I was looking at putting a Schmidt hub inside a front 16 inch wheel, but I chickened out. Lacing might be very tough. On Sun, Aug 14, 2016 at 12:50 AM, Lee Hart via EV <[email protected]> wrote: > ken via EV<[email protected]> wrote: > >> I have a Bike E with 20" back wheel. Where can I find a reasonably > >> priced wheel that's designed to be efficent for that RPM / 20- 25 mph > >> and 36 volts. > > Michael Ross via EV wrote: > >> Better check me, I get 335 RPM at 20mph and 419 RPM at 25 mph >> 36 volts will get you less torque than 48 volts. Probably not a problem >> with a light bike like a Bike E. >> >> It will be quite tricky to lace such a wheel up as the spokes will have to >> be very short. Consider radial lacing (no crossing spokes). >> > > I didn't think you could use radial spokes with a powered wheel (can't > handle the torque). > > Honestly, I think you would be better off rigging up a mid drive. >> > > I agree. I also have a Bike-E, and have been thinking of ways to E-bike > it. But it has a 7-speed rear hub. You'd lose that if you go to a powered > wheel, which could make it pretty hard to ride under pedal power. > > I have a Giant LaFree E-bike. Its motor has a small sprocket with a > freewheel on it, which drives the chain. The rear wheel does not have to be > modified at all, and the motor benefits from whatever gearing you have on > the back wheel. This setup has worked very well. The only challenge would > be to find an appropriately sized freewheel sprocket for the motor. > > I also have a couple of "Warrior" E-bike friction-drive motor setups. They > aren't as efficient, but you can lift them off the tire when not needed to > have zero effect on efficiency. Yes, they slip when wet and can cause > faster tire wear; but it's a mighty easy system to put together in a hurry > for testing/evaluation. > > I have a conventional 26" bike with a front hub motor. It works, but I > really don't like it. It degrades handling, and the front wheel is inclined > to slip if you apply enough torque to be more than a gentle thrust. I think > a front-drive setup would be even worse on a Bike-E. > > -- > A designer knows he has achieved perfection not when there is > nothing left to add, but when there is nothing left to take away. > -- Antoine de Saint Exupery > -- > Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group > /NEDRA) > > -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 585-6737 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Mobile and Google Phone [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160814/cd18cf9a/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
