Tuesday, April 22, 2014

How to convert a standard bike to an electric?

Q. I have a 21-speed bike with 3 large sprockets, then 7 smaller sprockets in the back wheel. The wheels are 24", and I was hoping not to ave to replace the sprockets. I was wondering how I could convert the bike to an electric with a hub motor in the back. I'd like if you could tell me the cost of ALL the parts, including the battery, controller, hub motor, etc. Also, are there any bike conversion kits under $400? I'm on a budget, $400 or below, and I really want to switch the bike to electric.
What kind of battery should I get, and how much would it cost? A nice 15-25 mph is okay.


Answer
http://www.google.com/search?client=safari&rls=en&q=electric+bike+conversion+kit&ie=UTF-8&oe=UTF-8#q=electric+bike+conversion+kit&hl=en&client=safari&rls=en&prmd=imvns&source=lnms&tbm=shop&sa=X&ei=qRfjT6u8BKai2QXn8-XdCw&ved=0CHkQ_AUoBQ&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=39d5d82ff70abf3b&biw=1137&bih=614

What electric engine for my Pedal-Electric bike?

Q. Dear guys,
I'm going to turn my bike in a Pedal-Electric bike as a DIY work.
I saw there are a lot of motors:
250W
350W
500W
750W
1000W
Can you suggest me the best (couple or single) batteries (Watt and Ah) to bind with these motors?


Answer
You have to first ask yourself what kind of performance is required from your vehicle and what kind of budget you have to work with.

If you have lots of hills in your area of travel and / or think you might be packing quite a load you might want to consider a more powerful motor. The same might be true if you wanted to go faster but then you might want to consider a fairing to cut the wind resistance that is more of a factor at higher speed.

For a more powerful motor you will need to have batteries with a higher capacity for the same distance. Higher battery capacity will increase your distance you can travel. A too powerful motor will tend to drain your batteries unnecessarily.

You may also wish to consider the weight of the components as there may be times that you will be powering the bike without the benefit of the motor. A lighter weight will also extend your range.

I assume this will be your first project of this type. You are therefore likely going to want to gain from the experience while keeping the cost of the education to a minimum. I might suggest you go for a medium range of performance or cost. Good luck with it. If you document the conversion with pictures and a story you could post it on instructables.com or another site.




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Title Post: How to convert a standard bike to an electric?
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