Clearance Sale - Electric Bicycle Wheel Kit
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26" 36V 500W Rear Wheel KitSold Out
26" 48V 1000W Front Wheel Kit - Updated Version $110Sold Out
26" 48V 1000W Front Wheel Kit - New Version $105Sold Out
The higher the voltage the greater the top speed. Motor wattage tends to be rated at a certain voltage. If you increase the voltage you can generally get more power out of the motor without burning it out.
For example I have a 500w rated motor on my ebike and I run it at 82V and it can handle about 3,000w peak - done thousands of kms on it without issue. The controller obviously needs to be capable of the voltage you feed it.
Not sure how much power you'd want to put through a front wheel kit though as I don't think they are as safe as rear wheel kits, they are just slightly easier to install.
Also note that these kits would not be legal on Australian roads - we are limited to 250w here.
how fast is 250w vs 1000w?
what kind of bike do you have?
i just want something easy to setup and cheap for less than $1000 or 500 if possible
250w would be good for about 20-25kmph
1000w peak would do about 40-45kmph.
My bike can do about 65kmph (although I do have wide tyres and good brakes, otherwise it would be scary) - that uses about 2000w at 65kmph.
This is an older photo of my bike before i got road tyres and better brakes: http://i.imgur.com/EIzE7Cu.jpg - it's still a bit of a mess, I've been meaning to make a neat enclosure for all the electronics.
The lower your top speed the greater your range and the less batteries you need which is by far the main expense. I would recommend against getting SLAs, they are heavy and can't do many cycles. By far the cheapest per watt/hour batteries are hobyking 4s/5000mah hard case lipos which is what i use but you need to buy a BMS and wire it up or charge the cells seperately which is a pain in the butt.
For an easy setup I'd recommend getting a lithium iron setup - there are lots that come in cases that you can mount direct to the bike and they also come with a charger etc..
For 1000 you should easily be able to get a kit that includes everything you need including batteries.
A good place to checkout would be http://dillengerelectricbikes.com.au/
Haven't + this deal because unsure of the quality but at $99 it does seem like a good price if you can pick up a cheap li/ion battery with charger from aliexpress
@chiefbodge: that looks nice
but i thought 1000w was already creating debate over legality since its illegal
how do you have a 2000W???
i really dont wanna spend time on building a kit. theres just something about bikes that puts me off tinkering even though i love to tinker usually.
is there a cheap off the shelf option?
how do you have a 2000W???
as long as he only rides it on his own private property its fine, its only illegal to ride them in any public space (roads, footpaths, bike paths, skateboard parks, shopping center car parks etc etc etc)
This one is 36V so I guess 3x 12V.
Since W = V x A
Can we limit the W power by underpowering it via battery supply?
ie Just buy the battery suitable for a 200W/250W motor?
top kek
Highly illegal but zero reason why you just can't get a lower wattage controller.
200W motor only or 250W if the motor is activated by pedalling
How will you get pinged, do the cops come at you with a voltmeter?
Couldnt you just stick a 200w sticker over the 1000w sticker?
They'll pretty much either raise the back wheel and floor the throttle or take it out for a spin themselves… or clock you physically doing more than approximately 25km/ph
OK, I wasn't after speed, more after longevity and torque lugging me and a trailer full of groceries several km back to a boat.
Unloaded speed is not relevant as some motors use the windings to limit speed thus giving a higher indicated speed at no load.
As long as you are pedalling you can go as fast as you like as the motor is meant to stop assisting at 25 kph + or - 10% there is no human powered limit other than the speed limit.
I doubt most police would test ride a bike and may not be allowed to.
@geebee: Under TORUM they have the power to test a vehicle to determine whether it complies with vehicle standards (long story).
But if your clearly not pedalling and hurtling along a flat piece of road at 40km/ph obviously somethings up…
BIG motor, lower wattage controller. Gives you all the torque of a big motor with none of the legal hassle and increased reliability.
I have seen 2 people pulled up on the tv Australian cops show for doing exactly that, over 40 kph zero pedalling, you would have to be stupid to do so though :)
I don't condone illegal ebikes, just pointing out the difficulty in the police proving it on the side of the road other than by rider stupidity.
just pointing out the difficulty in the police proving it on the side of the road other than by rider stupidity.
the laws are written that if they SUSPECT a bike is over the power limits they confiscate it and get it tested. if caught its thousands of dollars in fines and loss of car licence
How will you get pinged, do the cops come at you with a voltmeter?
see my other reply ^
Couldnt you just stick a 200w sticker over the 1000w sticker?
you really think cops, whos jobs are to deal with this sort of shit every day… dont know the difference between 200w and 1000w bikes?
So if you made sure you never went above 25kph would you be OK?
@Gaz1:
well no not really, like i said above if they have any suspicion or even just decide they dont like the look of you they can confiscate it and test it.
unlike america where you have to be under suspicion before they can stop you we dont have any sort of laws to prevent stop and search by the cops and in fact we have laws specifically written to protect the cops ability to do exactly that. they are able to stop you at any time for no reason at all can stop and detain you simply to find out who you are (check your not wanted etc) even when you have done absolutely nothing wrong.
In my lifetime I have had a cop not know what a HQ holden was, he asked me when he was writing a ticket.
I have had another not notice a 15hp outboard had a 4hp sticker on it to get past regs.
I have had another not notice a bike was a 500cc with a 250 cc sticker so yeah, I doubt most cops would know the difference.
@Davros: you are free to break the law in what ever way you choose, i have not only done very similar myself but known plenty tho have gotten away and plenty that have got busted doing so with varying results. in all these deals that ive commented on ive never said not to do it just to be aware of what you are doing and the risks involved in breaking the associated laws.
for me losing my licence is probably the only thing stopping me from having one myself because i cant function without a car licence, YMMV
Interesting, we are about to move onto our boat and my motorbike is to much weight to take.
These, if any good may be the answer as we have a couple of nice pushies.
Anyone have any experience in front wheel drive?
I had a similar thing to this years ago, but much more expensive.
You will need to buy and attach an appropriate battery, which will cost much more than $99.
Normally you mount them on a rack over the rear tyre.
If it's a lead acid battery it'll be very heavy and drastically change the bike's balance - you'll have to be careful to stop it tipping over from the extra weight, or have the front wheel skidding out on corners. It is doable though.
If you get some sort of lithium battery, it'll be much lighter and the bike will be better balanced.
But be prepared to pay much more than a lead acid battery.
No battery eh? Thats a bummer.
I have plenty of battery onboard but I imagine a 76kg 200ah AGM would affect the balance somewhat.
High powered front wheel drive means you MUST use a steel fork with torque arms, failure to do so will result in a broken dropout and a face plant.
Other than that FwD can be interesting as the front can slide on corners if gravel, you get used to it and with pedalling gives 2 wheel drive.
What are torque arms?
Basically they stop your forks breaking and causing a face plant with a higher powered motor, more critical on front forks but absolutely essential if you want to run aluminium forks (not advisable).
http://www.ebikeschool.com/torque-arm-need-one/
Shouldnt it say here battery not included?
Also wouldnt it be cool if when you put the brakes on it would charge the battery. What about when you pedal as well?
That would be cooooool
Im guessing it would cost too much
Regenerative braking is a pretty common feature on ebikes - my cheap chinese controller has it, you can even program the amount regen you want. When you pull in the brake lever slightly it activates the regen. You can pedal and charge the battery while holding the brake lever in slightly but it would be a horribly inefficient way to charge the battery.
My cycle analyst tells me that I only make back about 3% via regen so it's not really a huge amount recovered but I guess it might be more if you are always speeding up and slowing down.
Regen is actually getting very rare on E-bikes as most hubs are now geared which means they cannot do regen as they have a free wheel internally, Mid drives are also getting popular and also can not do regen.
Direct drive motors are on the outer due to lack of low torque in comparison, except for high power usage as they are heavier and create more drag when pedalling without power, but they tend to be very reliable due to few moving parts.
I bought a 36v 800w rear kit from Voilamart, install was sub 1 hour, motor was 135 mm so a drop in fit.
Test with the motor wheel off the floor, my throttle on zero had the motor doing 10 kph :), easily fixed as it was catching on a wire internally (just a mass production glitch), luckily I always power up with the wheel in the air first time.
Remove the tyre and tube and fit rim tape as it is not fitted and will cause flats, a couple of layers of electrical tape work in a pinch.
The motor works very well with heaps of torque, I will be fitting a spare 200w speed controller to mine so it will go from 26 amps to 15 amps but should still give nice assist.
The kit (ignoring the throttle issue) is much better than expected.
If they still had the 36v 800w rear kit in stock I would grab a spare I was that impressed.
Is there a way of limiting the power to make it legal?
Otherwise are there kits available that comply with the law?
Is there a way of limiting the power to make it legal?
probably not, altho you can use a lower voltage than its designed for i know when it comes to complying with road rules doing those sorts of things to get around legalities are usually not acceptable…. but the reality is that you would have to take it to court and fight it out there at a cost of probably $100k or more… i have been through this process with vehicle mods which were technically 100% legal but without a fight they would not just accept it and change their interpretations. laws are NEVER simply black and white which is why good lawyers get paid so much money to find ways around interpretations of them.
Otherwise are there kits available that comply with the law?
yes, any 200W kit is legal. some people on here claim their interpretation of the laws say a 250W kit is legal but everything ive read says otherwise and only fully complied bikes are allowed to use 250w motors and not just kits but again this is just the interpretations
edit: i have built and raced race cars as well and have had to interpret my way around CAMS rules and regulations as well so had quite a lot of experience with how rules are written and interpreted.
I wonder if it better to have 24 or 48V electric bikes , same wattage ?
2 batteries is cheaper than 4 x 12V batteries, that's the only advantage I can see