drawing board and opted for a hub that sits
inside the spokes to allow the wheel to flex and
feel more like, well, a bicycle wheel should.
They then put the motor inside a composite
shell that aids in keeping the motor cool, as
well as shaving nearly a kilogram of weight off
of any metal design. It’s still heavy, but the battery and wheel keep the center of gravity low.
And with the assist, you don’t feel a significant
The battery system bolts onto your bot-tle-cage bosses, and the battery itself can
be removed for charging or storage using an
included key. It can be charged while on the
bike as well.
Though we did the installation ourselves
(and you might be able to as well), it isn’t recommended. First and most important, it voids
the manufacturer’s warranty. Second, you have
to carefully run and mount the cables—a lot of
them. Mounting the extra disconnect switch
on the rear brake lever was a bear, because it
needs at least 5mm (3/16-inch) of separation
between the reed switch and the magnet to
Having your shop install it not only preserves
the warranty, but if you ever need diagnostics,
they can connect it to their computer and let
BionX connect to it via the Internet and pro-gram/upgrade it from their offices in Canada!
We had to take advantage of this service once
after removing the battery with the system still
on. Like pulling the plug on your computer, it
can—and did—cause problems that could only
be handled by diagnostics and reprogramming.
LIKE A SLINGSHOT
Once we had the BionX kit installed and
took it out for its first ride, well, one word came
to mind: wow! The power was astonishing. The
Model Dani Gerz had fun descending a hill in full regen mode
on EBA’s Mongoose Meteore outfitted with a BionX D 500
system. This bike/motor combo is fun!
1.) The kit comes in a box with everything your shop will need. You have to
buy the wheel pre-built for the size your
2.) Included with the kit inside the elegant case is the charge cable, G2 console, owner’s manual and two keys for
the battery pack. Keep them there and
you’ll never lose them!