electric bike 30 mph

[maniakske]

Hi, i want to make an electric bike with a topspeed of around 30 mph.
Do you guys have any suggestions? My budget would be 1000 euros, and i already have a bike.
Maybe a Crystalite 5303 with a 48V battery?
I am not hat handy with tools, so please don't make it too complicated.

 

[Joseph C.]

Hi, i want to make an electric bike with a topspeed of around 30 mph.
Do you guys have any suggestions? My budget would be 1000 euros, and i already have a bike.
Maybe a Crystalite 5303 with a 48V battery?
I am not hat handy with tools, so please don't make it too complicated.

You need a 48 volt battery all right to achieve those speeds. I highly recommend that you go Lithium Iron Phosphate LifePo4 rather than Lipo as this is your first build. Lipo can be highly dangerous, doesn't last as long, and is a lot more complicated to setup/maintain.

What range do you want?

Cellman of emissions-free.com is the man for geared motors which will easily do 48 kph (30 mph) if not more. He does complete kits that are easy to put together with very limited mechanical skill. All you need to be able to do is take off a bicycle wheel and put it on again. His 500 watt MAC motor at 48 volts will do the job for you.

If you are going LifePo4 you have two real choices for reliability - Ping or A123, Cellman does A123 which are currently the best battery you can get your hands on for safety and reliability. The downside is that they are quite expensive but you will still get an 11.5 amp hour MAC kit all in for around 800 euro, give or take with postage included.

An 11.5 amp hour, 52.8 volt (considered 48 volts) battery will give you a range of perhaps 25 kph at full tilt with some pedalling assistance. If you need more range - it will cost more.

Others will chip in with their preferred favourites but this is the only kit that I have experience of.

What is your bike going to be used for? What material is it made from? Where do you plan to mount the battery? How many gears does it have? These are questions that need to be addressed to see what your options are and what motor is suitable for your needs.

 

[velias]

Headway cells with the blocks work too.

 

[Pure]

48V20Ah on an X5204 will cruse at about 33/32 MPH without a problem. Give you a little better hill climbing ability than the x5303 and be able to handle some serious volatage and amperage once you get ready for it. BUT to cruse at those speeds with either the 03 or 04 you want nothing less than a 20 Ah 2C battery. They are amp hungry and will kill a 1C pack if you pull enough amps to sustain 30 mph with them. Just ask why my last pack died so soon. So if you go LiFePo4 stick with Ping, headway, or A123s.

 

[dogman dan]

Since the 5303 is a notoriously watt hungry battery killer, I'd vote for the motor from cell man.

He's here. Recomending this motor. http://www.emissions-free.com/catalog/i23.html

Batteries get expensive for good ones, but cellman sells good ones too. Like this. http://www.emissions-free.com/catalog/i28.html

It may be slightly more than 1000 euro, but maybe not. Depends on shipping, customs, etc. But worth it. Don't sweat sending money to cellman, his reputation is spotless. He's not fast to ship though, so don't panic if it takes some time to get stuff, or even get a reply.

 

[theRealFury]

As already stated 5303 is a battery killer and controller killer too. Also it is very heavy as far as hub motors go so unless you are wanting a super e-bike pushing 5-10kw of power through it for long periods then i dont think you need to be looking at a 53X.

I get 30MPH out of my Crystalyte HS3540, and i only run it at 1KW. 20 amps @ 48V gets me to 30mph on the flats, albeit not the fastest accelleration in the world but i dont want it to be, as i dont need blistering accelleration and wheel spinning power, and my dropouts and tyres will last longer without it.

My build tops out at about 33MPH freshly charged and down to about 28MPH when almost dead. Seldom see 33MPH though unless the wind is at my back.

Another option would be a 9C 2806 or 2805 would also give you around 30MPH, 2806 possibly just under 30, and 2805 ~35mph. and these will be much lighter than the 5303 as well.

 

[wojtek]

As already stated 5303 is a battery killer and controller killer too. Also it is very heavy as far as hub motors go so unless you are wanting a super e-bike pushing 5-10kw of power through it for long periods then i dont think you need to be looking at a 53X.

I get 30MPH out of my Crystalyte HS3540, and i only run it at 1KW. 20 amps @ 48V gets me to 30mph on the flats, albeit not the fastest accelleration in the world but i dont want it to be, as i dont need blistering accelleration and wheel spinning power, and my dropouts and tyres will last longer without it.

My build tops out at about 33MPH freshly charged and down to about 28MPH when almost dead. Seldom see 33MPH though unless the wind is at my back.

Another option would be a 9C 2806 or 2805 would also give you around 30MPH, 2806 possibly just under 30, and 2805 ~35mph. and these will be much lighter than the 5303 as well.

yes i agree. But if you want FUN, you should get 5404 and plenty of battery packs

EDIT: i would rather wait some time and save up to increase the budget - no point to go cheap on that stuff.

Cheap is expensive.
Faster is the worst enemy of fast.

 

[theRealFury]

yes i agree. But if you want FUN, you should get 5404 and plenty of battery packs

EDIT: i would rather wait some time and save up to increase the budget - no point to go cheap on that stuff.

Cheap is expensive.
Faster is the worst enemy of fast.

Yes i agree on the FUN part but if he is in europe then the laws on ebikes are so tight that he would not be able to enjoy the fun of a 5404 without standing out like a sore thumb to the police. I dont know how some of you Euro guys get away with going WOT... i have had some funny looks from cops just doing 15mph

I agree that cheap can be expensive as well, although i have spent about 900 euros on mine (not including the 500 euro bike ) so im confident he can do it right with 1000 euro's if he is not wanting motorcycle performance.