An Electric Bike Future? Count Me In

Cars are great, cars are fun- but if you’re looking for ultimate efficiency it’s hard to beat a bicycle. Pedaled or powered a bike will get your butt across town using a tiny fraction of the energy practically any other conveyance would. Meet my latest project:

I’ve been working on the parts for this bike over the last couple months in the machine shop- I’ve changed my mind a couple times about how to put it together, but now that it’s together it’s working as well as I could have possibly expected. Let’s just take a look at the specs:

What does this all mean?

25wh/mile is approximately equivalent to 1500 miles per gallon efficiency.

I just returned from an 11.68 mile ride on the bike in the Berkeley hills. I ascended Spruce to Grizzly Peak then back down Centennial Drive to Oxford, then back to the flats via Monterrey. That’s over 1100 ft. elevation change. I made it up the hill in 15 minutes, averaging almost 15mph, pedaling hard but staying in my middle gear and not working so hard (in my out of shape condition) to really feel beat up. The extra 500-800 watts of assist climbing the hills makes a world of difference. It’s almost magical. Trips that I would normally just hop in the car for due to lazyness or time pressure suddenly become bike trips with the electric assist. Added to the fact that the bike is simply a joy to ride. The motor and belt drive are quiet, the bike feels secure and stable and the bike has enough power to make riding as lively or easy as you want. Having a trouble-free charging setup and ample instrumentation thanks to the Cycle Analyst makes riding stress-free as well.

The energy used during this ride?

From what I’ve seen I don’t think this is exceptional by electric bike standards. Still, I am thrilled at the incredible comparative efficiency and effectiveness, not to mention enjoyable nature of riding this bike.

Posted on April 21, 2010 at 5:31 pm by Henry · Permalink
In: Electric Poly-V Bike, Life and Times

6 Responses

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  1. Written by bulaboy
    on April 22, 2010 at 10:30 am
    Reply · Permalink

    Whoa! Good-lookin’ conveyance there, bud! I’m very pleased and can’t wait to get a chance to ride it.

  2. Written by Unka Dave
    on April 24, 2010 at 4:46 am
    Reply · Permalink

    Better than compressed air. Damn! I kind of liked the idea of compressed air. Maybe we can hook a compressor up to a windmill, and eliminate the middle man.

  3. Written by unka dave
    on April 24, 2010 at 5:54 am
    Reply · Permalink
  4. Written by AcuteAero » Finding the E-Bike’s limits
    on May 8, 2010 at 10:47 pm
    Reply · Permalink

    […] is an extremely steep, notoriously and constantly steep- it goes from bottom to the top of the same hill I climbed last time, just in less than half the distance. I usually replied that I thought probably not- and now I can […]

  5. […] I decided to run a single stage poly-v belt reduction on the e-bike instead of a two-stage timing belt/chain reduction on the advice of Bob Schneeveis I set about […]

  6. Written by Maia W
    on May 19, 2010 at 11:02 pm
    Reply · Permalink

    way to go, Henry!! that’s so awesome!!

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