http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160AB1096
I agree with this ES post. This represents the topography in my area:
Re: California: AB-1096 to classify an "electric bicycle"
(Link Removed - No Longer Exists)by
Alan B » Fri Apr 24, 2015 3:30 pm
This does appear to be progress in a number of ways. It is a bit of a loss, before we had 1000w, but that is a fairly small difference from 750.
The new rules would allow the new "class 3" 28 mph ebike to operate in the bike lane alongside a highway, which is part of my commute, and a useful upgrade from the 20 mph allowed before.
However climbing the 15% grade (also part of my commute), a 750 watt ebike will only make 7 mph, which is not too useful for commuting and creates a lot of unsafe traffic flowing past the rider since there is no bike lane there. To travel at 20 mph on this 15% grade with a 330 pound bike, rider and gear requires about 2500 watts (from ebikes.ca sim). 28 mph requires about 4KW.
So the power levels are out of sync with the speeds. In fact, it appears that 750W is insufficient to propel a 330 pound mountain bike setup to 28 mph even on a flat surface, it requires about 850W to do so. So to make a 28 mph ebike that is legally running 750 watts will require a recumbent or a road bike and lycra.
I wish they would stick to speed limits and not try to legislate power limits. The gradient and load capacity needs of riders vary a great deal (especially with cargo and hills), and the power needed to accomplish the job changes accordingly. A 30 mph moped is allowed 4 brake horsepower, or about 3000 watts. A class 3 eBike needs about 2500 watts to make 28 mph on a modest gradient and would only make 20 mph on a 15% grade, which is not the steepest grade encountered in my area. Speed is easy to measure from a distance, or automatically whereas power is not simple to measure.
-- Alan
W6AKB,
GreyBorg,
BikeE,
Commuter MTB,
myEbikeSite
Alan B
100 GW
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Joined: Sat Sep 11, 2010 7:43 am
Location: San Francisco Bay Area, USA
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