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Hi I was wondering if any bike engines would be compatible for a adults tricycle? An example of the bike I am talking about:

http://i.ebayimg.com/00/s/NDAwWDQwMA==/z/tD8AAOxyKsZRw-eT/$T2eC16NHJI!E9qSO8GUrBRw-eTDF2!~~60_12.JPG

TinyURL: http://tinyurl.com/otuo2d2

Thank You

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I'm pretty sure I've seen pictures of purpose-built motors for trikes. Or one could always install a battery-assist front hub. –  Daniel R Hicks Apr 2 at 17:49
    
Keep in mind that most of the battery units are "assist" units, and will (intentionally) not provide the power to move the bike without pedaling. They aid mainly in acceleration and hill-climbing, not so much for sustained riding. –  Daniel R Hicks Apr 2 at 22:00
    
@DanielRHicks in Australia a lot of the cheap kits are actually twist-throttle or other power kits, not assist. They're popular specifically because you don't have to pedal. –  Nuі Apr 2 at 22:03
    
Here is one that went from an angle of add pedal to an electric. A trike can take a bigger motor and battery. lightfootcycles.com/pedal-power-golf-cart –  Blam Jun 22 at 17:38
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2 Answers 2

Most front wheel motors will work on the trike and will install in a very similar way. There are a lot of kits on ebay, ranging in price from a couple of hundred dollars up through sensible prices to quite silly. See this question for some opinions on the cheap kits.

bicycle hub motor kit

Most crank motors will also work and be easy enough to install. This Sunstar kit, for example. The advantage is that it uses the gearing system on the trike, so it works better than a hub motor when the trike is going very slowly. The disadvantage is that it's a pedal-assist motors, so it only works if you're pedalling.

sunstar crank assist kit

My suggestion is that you find a local bike shop that has experience with electric bikes, ideally one that sells kits, and get them to supply and fit a kit for you. While it's possible to do the work yourself, unless you have the rights tools and experience it's very easy to make mistakes and end up with something that's unsafe, doesn't work, or is unreliable.

You can also buy ready-made electric trikes like this one. It might easily turn out to be cheaper to do that than buy a trike plus a kit if you don't already own the trike.

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This bike looks similar and utilizes an engine in the front hub. You won't get as much range as you would on a bicycle, but there's lots of room for extra batteries on a tricycle. The bike in the link states it gets 30 miles on a charge, and can reach speeds of 25 mph, which is pretty impressive.

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