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Old 07-16-2014, 12:22 PM   #1
evolutiongts
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My 50mph electric bike

My other bike, 45mph+ on a electric bicycle during the busiest street. Technically a motorcycle disguised as a bicycle.










Charging my 20v batteries in parallel, 83volts of pure DC power.










Weighs about 55 lbs without batteries so I can carry it on my car.



Motor requires virtually no maintenance, only have to replace the bearing on the axle every 50,000 miles or so. Its a $2 part.

Last edited by evolutiongts; 07-16-2014 at 05:18 PM.
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Old 07-16-2014, 12:24 PM   #2
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Re: My 50mph electric bike

Build details? That thing is pretty slick. With the video sped up I can't tell how fast you're going but I noticed you pedaling from time to time. Going up hills or just feel like moving your legs?
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Old 07-16-2014, 12:25 PM   #3
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Re: My 50mph electric bike

Video is normal speed, I pedal to put less load on the motor, conserve battery power.

Details:

Giant Trance Full Suspension Mountain Bike
Shimano 4-Piston Hydraulic Disk Brakes with 203mm disc rotors front and rear
Motor is Crystalyte HS3540, direct drive rear hub motor.
Batteries are RC Lithium polymer 84volts, controller is set at 50Amp discharge, giving about 3800watts of power under full throttle.
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Old 07-16-2014, 12:32 PM   #4
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Re: My 50mph electric bike

What is the range on that battery? At 50 (49.5) mph isn't it legally a moped and need lights, and approval, and stuff? Is it as much stupid fun as it looks? When do you do the dirt(trail) bike version?





And where's the engine noise? (None on the videos. )
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Old 07-16-2014, 12:35 PM   #5
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Re: My 50mph electric bike

Pretty cool, how long till the batteries are dead?
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Old 07-16-2014, 12:37 PM   #6
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Re: My 50mph electric bike

Quote:
Originally Posted by Born again Biker View Post
What is the range on that battery? At 50 (49.5) mph isn't it legally a moped and need lights, and approval, and stuff? Is it as much stupid fun as it looks? When do you do the dirt(trail) bike version?





And where's the engine noise? (Non on the videos. )
Range depends on speed, under hard riding about 10-20 mile range. Taking it easy 30-35mph with cruise control brings it up to 30 miles. Wind resistance kills battery power, and over 20mph wind drag is substantial. On the bike trails with my financee we go 20mph with pedalling easily close to 75 mile range.

Well technically it is a moped but I can pedal with the motor off, it rides and looks like a bicycle.

Yes, its stupid fun as it looks, my SV650s just sits in the garage all week. My electric bike is my daily commuter, its fun to pass cars and motorcycles on a electric bicycle.

The slick tires I have on are ok for light trails. I'm going to build a dedicated off-roader in the future.

Heres my fiancee's 38mph geared electric bike, sounds nice.


Out accelerating cars gives me a grin everytime.

Last edited by evolutiongts; 07-16-2014 at 12:50 PM.
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Old 07-16-2014, 12:50 PM   #7
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Re: My 50mph electric bike

what was the cost of the equipment to set this up (not the bike itself, just the equipement)

i am seriously considering doing this....
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Old 07-16-2014, 12:51 PM   #8
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Re: My 50mph electric bike

wow, easily one of the coolest threads ive seen in awhile. I want one!
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Old 07-16-2014, 12:57 PM   #9
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Re: My 50mph electric bike

Heres the motor I used:
http://www.ebikedeal.com/crystalyte.htm $350 and It already comes laced into a standard 26" wheel for mountain bikes.

http://www.lyen.com/ Get the 18fet controller about $200

http://www.ebikes.ca/product-info/gr...e-analyst.html
You'll need a display that will tell you battery capacity, voltage, speedo, cruise, throttle tuning, etc. About $150

I chose RC batteries because they are lightweight and powerful. You will need about 6 of these for 70volts, and 8 for 100v, easily over 50mph top speed.

http://www.hobbyking.com/hobbyking/s...lipo_pack.html

About $400 for batteries.

Heres the best lithium battery charger.

http://lipoconnectionsolutions.com/i...ger-308Duo.htm

About $269

http://lipoconnectionsolutions.com/2...rgers-2462.htm
I use these Dell server power supplies for my charger, takes 30 minutes to fully charge my batteries at 40amps.

Now there are cheaper parts out there but the ones I've listed are the highest quality.
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Old 07-16-2014, 01:08 PM   #10
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Re: My 50mph electric bike

Quote:
Originally Posted by Domiken View Post
Pretty cool, how long till the batteries are dead?


30 mile ride and still plenty of charge left.
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