[ckelly78z]

I went with a front wheel 36V 500W unit https://www.ebay.com/itm/Ebikeling-Waterproof-e-Bike-Conversion-Kit-36V-500W-700C-Geared-Front-Rear/164290662247?hash=item26407c8f67:g:VqUAAOSw7G1fDi0 2 on my 29" mountain Bike, and love it.

It has 5 speeds, and pedal assist, and/or throttle, and will run about 26 mph electric alone, or 30+ while pedaling. I have a smaller bottle cage battery that still gives me a 25 mile range, and longer if pedaling. https://www.ebay.com/itm/36V-7AH-Ebike-Battery-Li-ion-For-250W-350W-500W-Electric-Bicycle-Bottle-with-USB/353154618486?hash=item5239a7d476:g:-4AAAOSwr2tfIogv.