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Old 04-10-13, 01:15 PM   #1
thechidz
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considering a Raw electric chopper

* 48V Battery * Alloy Brushless 500w Motor * High Speed - 25 MPH * Distance Per Charge - 25 Miles * Charge Time 4 - 6 Hours * Rear Tire Size - 24" x 4.125 * Front Tire Size - 26" x 2.125 - Specs

I am looking at a bike with the above specs. I need a bike that can get me up a long steep hill everyday for my work commute this summer with being drenched in sweat when I get there. I am a big guy so not sure if this bike will have the power to get my 260lbs up the hill, what do you guys think?
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Old 04-10-13, 01:50 PM   #2
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With your size I'd go with a 1000w motor. The 500w will take a 160 lb guy up a good size hill. But at your size you would have to paddle a lot more then with a 1000w motor. Now about the battery, due to your size it will drain a lot faster then with a avg test rider would. See most E-Bike company put a 160 lb test rider on the bike and keep the speed down below or at 20mph. Thats how they come up with the range. If you add the 100 or so LBS on the bike then it would cut the range by 5 miles or so. So you'll have to take that info into account as well.

Here is a video I found on that bike enjoy: http://www.youtube.com/watch?feature...&v=fNMxYR-h3Ao
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Old 04-11-13, 06:50 PM   #3
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thanks for that very helpful info. What do you think of this one?

http://www.conhismotor.com/ProductShow.asp?id=209
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Old 04-12-13, 04:11 AM   #4
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I have looked at these bikes before. Looks like a good price untill you go to check out and then find they charge $550.00 or so for shipping. That puts the total price in the low -to mid range of e-bikes. Most E-bikes that cost $1500.00 only come with a 10 amp hour battery. These bikes come with a 20 amp hour battery. All so with hills , wind and your size you should get 20 to 25 mile range out of that battery in electric mode only. The motor they use is a no name 5009 hub motor which I have find out that that motor is perty good. It also has a faster 4 amp charger then the 2 amp charge that most $1500.00 e-bikes come with. And the bike comes with a LCD Display Control Panel. Most bikes in this price range do not.

So with the 20ahr battery, Motor and LCD Display Control Panel.... it's a very good price. How ever I do not know anything about the company that make the bike. So if you get one of their bikes, I would good over every thing to make sure it's built right or take it to a good bike shop and have them do it.
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Old 04-12-13, 08:53 AM   #5
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thechidz,
I convert regular "high quality" bikes to electric. Here is a pic of one of the conversions I've done.
Note: This is a prototype, (I don't want to picture my latest technology for fear of someone stealing/copying it). The batteries will be encased in the triangle of any conversion I do (in a professionally built, custom fitting, waterproof, fiberglass enclosure)

IMO, this is the best way to go. It seems all commercially available "off the shelf" ebikes are made from cheap frames and low quality components. Choosing an off the shelf ebike just severely limits your choices. Doing this type of conversion takes advantage of the technology and versatility that is currently available in the biking community.

I would recommend a road/commuter bike to accomplish your goals. I know what you mean about not arriving to work in a sweat (I have the same concern). With this type of conversion, you only sweat if you want to.

I can convert any bike for you but, I don't work for free. For around $1300 (depending on your specs) an excellent ebike can be had. The batt pack I recommend is LiFePo4 and 24V/30ah. The recommended motor would be a quality Currie 500-900 Watt motor (mid drive which allows use of all your gears). This setup will easily accomplish your goals.

I am currently converting a Motobecane Gran Turismo for personal use (900W Currie Motor, 24V/30ah battery pack, 17 mile all electric range (225 lb rider at full throttle (flat surface)), 28mph max all electric speed (both specs were tested by me (I'm a little on the heavy side)). This is a $2100 bike when completed ($800 for the bike and $1300 for the conversion). The end result is a high quality road/commuter bike that gets you to work quickly and sweat free.

If interested, shoot me an email @ usnavystgc@yahoo.com
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Last edited by usnavystgc; 04-12-13 at 09:33 AM.
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Old 04-12-13, 10:35 AM   #6
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Quote:
Originally Posted by usnavystgc View Post

If interested, shoot me an email @ usnavystgc@yahoo.com
thank you very much. I will definitely consider it
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Old 04-12-13, 11:24 AM   #7
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So how does that/your set up work regarding the pedals usnavystgc? The pedals turn all the time the motor is powering the bike?
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Old 04-15-13, 08:10 AM   #8
usnavystgc
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The pedals only turn if you pedal them. If the motor is powering the bike, the sprockets move but the pedals do not. I have installed a front freewheel on the crank. I have come a long way since this build though. The current setup I'm running uses chainrings and an adapter plate. The end result is the same but it looks a lot better.
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