An Inexpensive Electric Bike Conversion Kit

by Justin on August 20, 2008


Sales of electric bikes have spun into high gear this year — some merchants like Amazon are reporting a 6000% increase this summer from last year. This is good news, because, for short trips, the efficiency and convenience of electric bikes is hard to beat.

Here are some statistics that still amaze me: 40% of all trips are made within two miles of the home, and 50% of workers commute five miles or less to work.

I recently heard about an inexpensive electric bike conversion kit that appears to be of good quality. It’s offered by a family-run company called AmpedBikes.

The founder, Danny L. Ray, was unhappy with the quality of the kits he was getting from China, so he visited China and found a company that were willing to build a kit to his specifications, using the parts he chose. The result is a $360 kit that he sells from his website. By comparison, other conversion kits such as the Crystalyte, the Wilderness and the Bionx cost between $500 and $1800.

The AmpedBikes kits incorporate a brushless 36V 500W electric hub, and can be installed on almost any bike with 26″ wheels. Ray says the kits can be installed in about 20 minutes, and he an installation video on his website to show how it’s done.

You will have to provide your own batteries — here’s a FAQ page with some suggestions for finding them (scroll to the bottom).

Read more! Related stories:

  1. Schwinn Electric Bikes Now Available
  2. Powerful Combination: Montague Folding Bike + Bionx Electric Conversion
  3. Schwinn’s New Range of Electric Bikes
  4. Turn Your Bike Into A Powerful Commuting Vehicle: StokeMonkey
  5. Electric Bikes For Commuters

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{ 36 comments… read them below or add one }

Obiwan August 21, 2008 at 1:16 pm

I like that you can fill in your own battery pack. That allows you to customize the capacity to your specific needs. I could see folks in hilly areas wanting more amp-hours than others.

There’s no reason you couldn’t build this into a 700C rim too, but you might have some issues w/ the width of the dropouts (assuming it’s 135 mm OLD) on older road bikes.

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nickjohnson August 26, 2008 at 8:56 pm

You know what’s more efficient than electric bicycles?

Bicycles.

They’re cheaper too

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fred December 11, 2009 at 2:47 am

always A strong supporter of the regular old bicycle, but I have been getting a tad older that I used to be, and have bad knees. without the electric assist, work was too far away, with too many hills. I couldn’t ride anymore. now I ride in, I pedal the whole way, (the batteries would not make it that far without it) I save gas, I get a workout, I feel almost like I did when I could ride myself.

still hate the rain.

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cephoe August 26, 2008 at 9:21 pm

Electric bikes are actually more efficient than standard bicycles. See this book for more details:

http://tinyurl.com/679wpv

Electric bikes are especially useful for those with kids in tow, or elderly people.

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jamey August 27, 2008 at 9:17 pm

Great commuters!

We have been using ampedbikes conversion for over a year now as commuters, I have 12 mile commute and my wife has a 6 mile commute. We ride them on the average of 4 days a week, we get to work sweat free and together we saved close to $6,000 last year on fuel prices.

We also have standard road and mountain bikes we ride on weekend for recreation and exercise, but during the week we commute for about $.01 per mile beat that!

Its fun, it gets us outside and gives us a different outlook on the day.

Jamey K.

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ras August 28, 2008 at 9:09 pm

good post Jamey,

I want to buy one. How much did you pay in the end for yours?

thanks

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jamey August 30, 2008 at 7:40 pm

Hi Ras. I paid $80 for batteries locally for 3 12V 10AH batteries. So I have a total of about$440 into it. But to be honest at this point cost is not a factor.

My next thing is I am upgrading to one of the new lightweight batteries.

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imsold September 2, 2008 at 11:31 am

Im sold.. I just ordered one after reading excellent forum reviews. I had to get on a waiting list for the 15th of September.

I went out and bought a nice comfort bike for the conversion at Wallmart for $120

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roger September 22, 2008 at 6:58 am

If you drove that on a British road, you would be classed as a criminal. :(

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bionx October 6, 2008 at 2:16 pm

BionX is made in Canada.. comes with batteries too! :)

Also, it fits many different sizes of wheels, (in both black and silver), it fits your REAR wheel.. has Li-Mn batteries..

By far, worth every penny.. I have one on my hybrid, and I love it!

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Safety First December 10, 2008 at 12:19 am

Rightfully so roger, in Britain there are lots of pedestrians the last thing they need is crazy people going around on electric bikes. Be environmentally friendly and walk, take the bus or subway. Save electric bikes for Americans. Don’t really even see what you would need them for.

BionX is a good system if you have the cash. On the other hand, if you use it every day, it will pay for itself. Find a local dealer to install for you, it will cost about the same and you get the warranty.

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Scott McElhiney December 17, 2008 at 12:35 am

Jamey K. stated that he and his wife saved close to $6000 last year on fuel prices. Using his numbers for commuting, I came up with about 3744 miles between the two of them. If you figure their car gets about 20mpg (low guess?) and gas costs $5 a gallon (never got there) it would still only be $935 in fuel in a year. Now add in all the other costs of car ownership and they could have easily saved that $6K… if the cars went away. Insurance, registration, repairs etc… but fuel costs? Come on your giving electric assist a bad name with bogus claims on the savings.

I’m interested in converting a recumbent to electric assist for commuting, I already rode over 4600 miles this year without any assist, but want more speed and not to sweat up during my commute going to work. But I’d like a system that drives through the chain so I can use my gearing with the electric. If anyone has some good suggestions… email me.

Thanks

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Joe May 31, 2009 at 5:29 pm

I’m also looking for an electric kit for a recumbent with a 16in wheel. Have you found anything? I’ve found a Cystalyte 36V kit, but I do not know if it actually would work.

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fred December 11, 2009 at 2:53 am

I use my gearing for my pedaling, the torque range on my hub motor is fine for all the speed ranges I use. (it is happy when I am in my highest gear at about 60 rpm) and it can give just a gentle assist or a healthy assist at any speed I ride.

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Bill Snow December 18, 2009 at 3:40 pm

Electric drive with power through the chain? Contact Jerry, The Scooter Guy, I have a Tour Easy recumbent with a small 1.6 hp Subaru motor that runs through the chain gearing and it works great. Will soon be doing the same thing with another recumbent but using electric instead. You can contact Jerry by calling: 503 847 1118.

Bill Snow

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Patricia December 18, 2008 at 4:10 am

I was shocked at how much the kit cost but then I found out that it doesn’t come with the battery. My dad just started up an electric bike store called EZ Green Bikes and we’re selling them for $850 with lithium ion batteries.

All I have to say about electric bikes are that they are great and for those complaining about how people should just ride regular bicycles…it’s difficult for someone that has a zero to low activity lifestyle to hop onto a bike and commute to work or school. Don’t discourage people from electric bikes…it still requires some physical activity and it’s better than using a car which equals better health and a better environment. As for the cost I guess all I can say is…gas prices can’t stay low forever.

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Daniel j DeNapoli December 18, 2008 at 9:12 pm

i dont mean to cancle the warrenty on perpus but livining next to a moter sports machean shop plan on takeing it astep ferter i have a w.w.2 serplus dynamoter 6 v step up to 300 unreguated volts @ so so amps i might try it ive teted it idealy might work its like a moter w bult in genorator thay r still
around mostly in railroad eqwipment nowa days but if you bump into a w.w.2 tube mureen radio and know your stuff i hope any body can look up dc dynamoter on google today they come in 12v to who knows !a 16 ”
moped or dirtbike tire will fit a 20″bicycle rim i garontee ..the brushless hub i guss
migt need a more beefy and fool proof design on a moped frame an im wondering if ishuld power front and back too you can fit alot more power on
a resonably small cycle fram sligtly heavyer duty than a peddle bike

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pairoj February 19, 2009 at 8:12 pm

looking for bike electric about 500 watt
how much for 500 watt or 800 watt and 1000 watt
?

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Cameron April 20, 2009 at 3:32 am

I am an american so for you guys in the UK who think its a way to be eco friendly to walk. think of a coworker who walks to work and shows up hot, red faced and sweaty so he can save on gas. by hour one he’ll stink. i walk four miles to work ever day. i tell you id rather dole out the 400$ so i show up smelling fresh and not with sweat stains and blisters. that and it would cut my commute from an hour and a half to about twenty minutes. ive been the guy no ones wants to be with in ten feet of. its not fun, by the way i have a Aluminum PK7 21 speed and i use it but sweat is for the dogs

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Fritz Jackson April 23, 2009 at 9:57 pm

My commute is 7 miles each way. No way that I can walk that in a reasonable amount of time. A bicycle is the solution. An electric bike is even safer b/c instead of a 3 mph hill climb I can do a 10+ mph hill climb. Perhaps even 15 mph hill climb. I would not worry about my relative speeds but I must mix with cars…

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john May 2, 2009 at 7:35 am

electric bikes are legal in the uk ..i ride one and they’re sold here ..i’ve had 2 heart attacks and i think it;s great

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Kevin May 4, 2009 at 2:53 pm

What I don’t get is why you can’t figure out the specs of electric bike motors. I have a cheap Currie bike that would be fine for flat terrain, but I need something that will climb steep hills for several miles. I was talking with a local electronics shop to see if they had recommendations and they said no, they don’t even work on them because of the quality of the motors. Which leaves me wondering, why can’t you find out if these kits are any good? I don’t want to buy a motor that’s only going to last 2 years. There are so many kits, motors, and electric bikes out there but I’ve yet to see a comprehensive rating system. It’s just a wild frontier of start ups as far as I can see. Any suggestions on where to get good information?

And to save comments from the “purists”; yes, I understand I can ride a bike without a motor. But, I use my electric bike for commuting to and from work and don’t want to be covered in sweat. Hence the electric bike. As a bicyclist, car drivers, walker and electric bike rider I get the pecking order: cars drivers don’t like bicyclists of any kind, bicyclists don’t like people using electric bikes, and walkers don’t particularly care for any of them.

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fred December 11, 2009 at 3:00 am

for reliability
I bought a used hub motor on ebay years ago, and the first problem I have had is the guy ? who stole it out of my (locked) shed. it is a simple design, few moving parts
make sure your controller gets air flow, and charge your batteries asap if you have sealed lead acid (sla)
and…. stay on the black stuff between the trees.

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Sharon Taylor June 29, 2009 at 7:01 pm

We saw rode and bought 3 ampedbikes kits yesterday. They were at the car show, very helpful, knowledgeable and we are all up and running today. We saved about $4,000 as we were going to buy schwinn electric bikes.

The ampedbikes have more power, no noise, easy to install and a blast to ride.

Danny Ray was very knowledgeable and helpful throughout the whole process.

Thanks Danny!!!

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Jordan June 30, 2009 at 6:04 pm

Sharon,

Can you tell us what you paid? We are looking at the E-BikeKit conversion system from http://www.e-bikekit.com and trying to decide between this and amped kit. The amped website is not that good but the e-bikekit site is pretty impressive. Does anyone know what the differences are between the two kits?

The E-BikeKit kit seems to offer a lot more out of the box and also a nice LiFePO4 battery. What kind of batteries are you using with your kits?

Would love to see pictures if you can post them:)
Best of luck to you. If you’re new to the electric bike you have a lot to look forward to. These things are so much fun!

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Sharon Taylor July 20, 2009 at 1:56 pm

The reason we chose the amped kits, was first off we rode them at the show, then did some research and found that they are just about the best on the market. There are alot of knock offs of the amped kits so we decided to simply buy the origional. We bought at the show so we paid around $320 each kit.

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Spence August 24, 2009 at 5:04 am

I took the plunge this year and bought an electric bicycle conversion kit. I’ve been wondering about doing this for ages and I’m sure glad that I did. I looked around for a bit but found this website:

http://electricbicycleconversionkits.net

It had loads of information and was updated often.

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dnmun September 5, 2009 at 4:36 pm

i just read this comment from jeff stearns and i find it totally false. i have five, yes five 9 Continents hubmotors i got through e-bikekits.com and not a single motor had a defective spoke, not one. 180 spkes, count em, not one!

if jason at ebikekits is correct and this is slander deliberately used to damage his reputation because he has undercut the price on hubmotors so much then the site moderator here should do something to edit the sources of these defamations.

if you wanna see how people feel about the 9C then go over to the sphere and see how many people talk about their builds using a 9 C hubmotor they bot from jason at ebikekits.com because he was so much cheaper.

i think his kits are great too because the 9 FET controller can be used at 48V and i figured out how to modify them to run safely at up to 72V lifepo4, and because the motor is direct drive with seals on the axle to keep out water. i did not want a geared hub because i want to use regen for braking and the large direct drive hub motors can handle the heat over longer periods of heavy use. just everything about my 9C i think is so neat. but i don’t sell bikes or kits, i just like to build my own.

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thom york September 5, 2009 at 5:25 pm

Folks. you shouldn’t trust some of these comments since they are planted by the competing manufacturers. All of the equipment for both of these bikes kits are made in China in the same factory under the name 9C and then rebranded here in the US.

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dnmun September 7, 2009 at 12:34 am

that is an insult. i have 5 of these ebikekit motors and controllers. what i was responding too is the delberate lies spread by that phoney eric guy about how the spokes are bent, and how it is dangerous which is a total lie. the wheels came in perfect shape, and i have a park truing stand to establish that, so i can say for certain they are not bent or have bent or damaged spokes or dented rims, which i have seen on other bike kits that get shipped direct from china since i help out other guys here in portland with ebike problems from buying the ebay special ebike kits.

9 continents makes a buncha different motors for sure, but they don’t put the kits together and this kit from ebikekit i feel is so much better for the money because of the 9 FET infineon controller and i was able to buy a kit so cheap from ebikekit that i bot 4 more for a community ebike sharing project i am starting in portland. if you something about ebikes you would know what i mean, and who i am.

i thought it was amazing that jason would actually pay the conversion fee for newbies to have their motor and controller installed at the bike shop if it was too difficult. which it really may be for people who are totally green in terms of tinkering. but for anybody who likes to build bikes like me, then the deal was the cheap price from ebikekits.com, so that’s why i bot from him. i wanted to buy a 9C kit from justin but it was just outa my price range until jason offered them so cheap.

the difference between the direct drive and the geared motors is the ability to use regen for braking with the direct drive motors but you cannot get regen out of a geared hubmotor.

also the ability of direct drive hubmotors to shed more heat than a geared hubmotor, from the large amounts of power that get pushed through the motor, is why i wanted to use a direct drive 9C rather than the geared type hubmotor.

for someone like me who has to fight the rain then one of the most important features on the 9 continents motor is the seals on the axle to keep out the moisture because that is how the hall sensors get shorted out and die. even C’lyte is now using seals like 9C has on the axles. this is so important in the pacific NW. a lotta of us up here like our electric assist, in large doses. but rain is the enemy of ebikes everywhere and so i think the seals are proof of their just overall higher level of quality.

power was why i did the 72V upgrade thread on the 36V 500W 9 FET Infineon controller that jason includes with his ebikekit and posted it up on the sphere. this controller can be reprogrammed to adjust the regen and power so they provide a useful platform for those of us who want more. and cheap too. i know a lot of other ebikers on the sphere that bot hubmotors and kits from jason at ebikekit.com too. we weren’t swayed by lies from fake phony guys.

we bot the best we could get for the least amount of money. same as anybody would. that’s what jason offers.

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steve September 19, 2009 at 8:33 pm

Please send me information on the electric bike

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mrgarci1 September 29, 2009 at 1:30 pm

I am also a member of endless-sphere and while I don’t have a kit from 9c, I can stand behind dnmun’s posts – he is not a vendor, is a truly objective consumer, and has always been honest and forthright on the boards. The Jeff Sterns post, in my opinion, is a complete smear campaign by the ampedbikes people, which is unfortunate – up until this point I had thought ampedbikes was a reputable company, but I’m reconsidering that. I have heard nothing but good things about Jason e-bikekits.com

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Francisco December 8, 2009 at 11:58 am

please send to me the information on the electric bike conversion

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E-BikeKit December 12, 2009 at 11:38 pm

For more information on the best buy in electric bike conversion please visit E-BikeKit.com.

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FALCON EV January 30, 2010 at 10:05 pm

I guess I need to throw my hat into the promotion ring here too.
visit http://www.falconev.com for some different motors and batteries.

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Anonymous November 26, 2009 at 9:41 pm

its probably made in india

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