Electric bikes, bicycles and pedelecs

i heard somewhere that power assist kits use the disc brakes somehow.

i am assuming it requires replacing the disc rotor with a sprocket

does anyone have any one know of any sites that sell hubs that can take a 72 tooth #35 chain sprocket?

I recently bought a Global Ebike and found that the 24v battery is not enough to get the speed I would like. I saw on Youtube someone who took a Dewalt 36v Li-Ion battery and used it on his ebike quite effectively. I am not really experienced with batteries and their properties, so I need some input on the possibility of making such an increase and what steps to take.
Any guidance would be greatly appreciated, :?
Gary

I just bought my bike its just like this one http://www.trekbikes.com/us/en/bikes/20 ... h/fx/73fx/ The front fork is an aluminum alloy, stronger than aluminum, not as strong as steel. My wheels are 700c. I have a topeak rack and bag for the battery. I have narrowed my choice down to the Yesa 110U.4820F LifePO4 Battery Pack 48V 20Ah or a Ping duct tape 48v 15Ah pack, these will fit in my bag. I need some help choosing the best motor and controller for my bike. I have been thinking the 406 is the best choice since it gets .97kpv.

So I've bought all the parts for my twin 400w kollmorgen electric bicycle project. I've received the motors but the rest of the parts are on the way. Aside from a new rear wheel to mount on the front fork (fwd) the only thing I did not purchase was a throttle. I need to run both motors evenly but both require a 5k pot.
1) Can I run two of these motors(controllers) off a single 5k pot?
2) If not does anyone know of a source to find a dual 5k pot(six wires, two pots connected on a single shaft)?
3) Will a pot with ohms over 5k work?

http://www.youtube.com/watch?v=-YmgVcd_aAE

I am new to this board, but I did try to search for "vanguard" before I posted this to make sure this topic wasn't beat to death. I would be suprised if this video hasn't been posted here, maybe the search is fubar?

Hello dear people on this forum.

As little child I've had an obsession for batteries and keep large collections of differal types of batteries. From Penlight, baby, mono, D22 and other types. I've had it all.
Then my passion for computers began. It is my primairy job; IT manager (high education/graduation OOAA)

I have a 36v 20ah lifpov battery and a 500watt motor. The battery just has crimp ready wires. The controller for the motor came with a three prong connection piece that is 240v 10amp. Would that work? or do I need something stronger?

Hey, folks. I've got a 36V EV Global bike, brand new battery. Frequently when I'm going up hills, about 3/4 of the way up, it does its three beep "pedal assist requested" thing. Of course, I'm pedaling the whole way - I guess just not quite hard enough. Usually by that point in the hill, it's getting all the assist I've got to give.

Have a 24-v system. Out of the blue, accelerator trigger stopped activating the motor. Lights, horn, status lights all work. Batteries show a full charge. Live in MN. Don't know where to start. No service in my state. Please help. I would be fixing the system myself. Private email responses are welcome.

Hi All,
I'm interested in purchasing an ebike and it seems that the cheapest option is to go with a bike made in China. However, in my searching I have developed some questions.

1) How long do the batteries last, both per charge and lifetime?

2) What is the realistic top speed without pedaling?

3) What sort of maintenance is needed? How self serviceable is it?

4) How is the bike on hills? Does it have a set of gears?

5) The wheels are 22"; how easy is it to find tubes and tires?