I have massive outrunner motors and lipoly batteries.
These are much lighter and stronger and more efficient than lead acid batteries or brushed motors.
Video of bike with simple drivetrain:
Web page for the bike:
Came from forum:
We need a good drive train.
Check out this one!!!
This drive train is neat:
with good power and great handling because of weight-balance
Is anyone really happy with a hub motor on their bike?
Please post drive train ideas or links.
I need to hook this big boy up with some nice lipolys.
the batteries are still expensive but you save about 60 pounds on the bike! so you don't need as much MAH.
Also the motor is more efficient and has a better rpm power band.
12v 4100mah $60
48v 4100mah $240
48v 8.2AH $580
That sounds bad but I get to use a normal bike not a set of monkey bars with gym weights for batteries.
A lead acid bike is impractical or you'd see them around and kids would use them.
A light lipoly attachment to a bmx bike or other would appeal to more of a market.
So those who can, will do it!
Those who say it can't be done - If you argue enough for limitations they are yours.