Joined: Jun 2009
Posts: 2,242
Likes: 1,659
From: PacNW
Bikes: Dinucci Allez 2.0, Richard Sachs, Alex Singer, Serotta, Masi GC, Raleigh Pro Mk.1, Hetchins, etc
the energy has to come from somewhere. on a car you have several thousand pounds of mass to slow down which charges the battery thru regen braking
on a bike with rider you have 200-250 pounds AND the extra weight of the batteries and charging unit (which have to be accelerated, ridden uphill etc)
Also would require a more complicated hub assembly for the regen brakes.
I don't think there's enough net energy recovery to offset the additional weight.
/markp