Re: electric bike

[evsnw@halcyon.com]

William Korthof writes:
"I would also point out that Green Motorworks
>sells an even simplier/lower cost/lower powerd
>bike assist system than the ZAP system. Their
>EROS system uses a smaller 12 volt pack (12
>AH nominal), a single motor (same as the ZAP
>motors), and the same style of mounting as the
>ZAP system. Last time I checked, their price
>was $199. Because it's single speed, unlike the
>ZAP's three speed system, it isn't effective for
>regen, and it's got less power available, but it
>noticeably lighter than the ZAP."

Indeed, there is a workable $199 system!
However, the ZAP single motor/the EROS motor is a bit larger than each of
the similar motors used in ZAP's dual system. EROS is, of course, also
on-tire drive but the EROS' modest clamp attachment is not comparable to
ZAP's. The EROS unit does not have a lock-down lever. (We use, instead, a
standard wire+lever on the handle bar to lift the roller on/off the tire).
ZAP does not use a 3-speed system. The dual ZAP is two-speed (with regen in
low), while the single ZAP as well as the EROS are one-speed.

Olof Sundin
Electric Vehicles Northwest
www.electricvehiclesnw.com