Electric Bikes - E-bike frame question
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06-07-12, 02:18 PM
My dad just asked me to help him build an e-bike. I mess around a little with old road bikes so I know a little bit about bikes, but nothing about e-bikes.
What kind of frame should I be looking for? He plans to use it as his primary means of transportation around town.
Should I get a mountain bike frame with front and rear shocks or would a old schwinn varsity frame be enough? Hes a big guy and Im sure he needs something bomb proof.
06-07-12, 05:45 PM
What's your budget?
If I were to build another e-bike I would choose the Kona Minute: http://www.konaworld.com/asphalt_simplicity.cfm?content=minute
The rear frame rack can hold 100 lbs and the bike can hold over 200 lbs!
I would put on street tires with a kevlar lining or use Armadillo tires, Mr. Tuffy tire liners (http://mrtuffy.com/ultraLite.php) and use Sunlite thorn proof inner tubes.
Get a powerful hub motor 48v 1000w (http://www.electric-bikekit.com/categories/48v-1000w-electric-bike-conversion-kit.html) and use the Cycle Analyst to control the power.
I would replace the original saddle and put something comfortable for your dad.
Check out the write-up on my e-bike for the details and security measures: http://www.bikeforums.net/showthread.php/803098-Anyone-heard-of-or-purchased-Papamotor-electric-conversion-kits?highlight=anyone+heard+of+papamotors
Keep us posted on your build. :thumb:
06-07-12, 09:41 PM
Wow thanks for all the great info! My dad is like 260 though. Is there any hope he can find something that could handle that kind of weight?
06-07-12, 10:38 PM
The Kona Minute shouldn't have any problems with 260 lbs. I asked my local bicycle store (LBS) about adding weight in the form of batteries to my Kona Lanai and they said it wouldn't be a problem. Kona frames are known to be very strong. If the town your dad will be commuting in has lots of hills you could install dual hub motors for more climbing power. ;)
Take a look at http://www.ebike.ca. They have lots of great information on each e-bike component.
06-11-12, 05:11 PM
Most all bikes even the cheepos at Wallie World will handle 250 to 300 pounds. You should be considering the total weight of the rider, batteries, drive motor, controller and any other thing he may want to carry. If you use a hub motor most will tell you it should not be considered as part of the total bike weight (for capasity). Depending on the type of riding your dad wants to do will also effect whay motor and batteries you use. Remember, lead batteries weight a ton so I would avoid them. Lipo, is not a great idea for a newbie. So I would recommend lifepo4. I would consider something like a Ping lifepo4 pack. Of course the size of the pack will depend on the motor you choose. Good luck and enjoy the build with your dad. BTW, maybe consider building 2 ebikes (one for him and one for you).
06-18-12, 05:14 PM
I really appreciate the knowledge and experience sharing. I'm hoping to meet up with my dad this week and nail down a plan and a budget. Thanks!
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