Showing posts with label eBikes. Show all posts
Showing posts with label eBikes. Show all posts

Saturday, October 6, 2018

When Is an eBike No Longer a Bike?

This Gazelle (from the Netherlands) appeared on the bike rack in the garage where I work.

eBike example at work

I am amused (or something) by the seat on the bike rack, which I guess is intended for a child too large for a conventional kid's bike seat. It would put a fair amount of weight relatively high up.

The entire bike is quite heavy. Out of curiosity I tried lifting it by the back rack and I would guess the whole thing is at least 60 pounds. So a certain amount of what the electric motor is doing is assuring all the bike's own weight gets down the road, before it starts in with the rider. Or riders, in this case.

Given the weight, I would expect hydraulic disk brakes, but it has conventional rim brakes. Perhaps you aren't expected to go that fast, but with this much weight and rim brakes, you would have less stopping power than you might want and go through brake pads at a pretty good clip. You would probably go through (expensive) wheel rims much more often than most people expect (which I think is typically never - people don't expect to wear through wheel rims with rim braking).

The Gazelle USA site suggests this kind of eBike costs somewhere upward of $2,500 - many of their models are around $3,500.

I guess because of the cost (value?), the owner of this thing has a chain that he uses to lock it to the rack. Most people do lock their bikes to the rack in this garage, but I don't see the point - there is no public access to this garage. I prefer to keep the time I don't spend messing around with bike locks. And certainly I don't carry a massive chain with me! Or any chain, actually. I use the strap on helmet through part of the frame to assure the bike doesn't fall down during the day - this is the worst sort of bike rack for that.

One realizes how things change looking at this - the Dutch Gazelle bike aesthetic (or something like that) for me was always a simple, mostly steel bike - utilitarian and simple. Ageless. This thing has heaps of plastic (that will most certainly age poorly) and I don't think "simple" is a word that comes to mind, although I guess it is utilitarian.

P8070917_2 Gazelle Toer Populair
"A Timeless Classic" from user MacFred64 on Flickr (CC license)

This probably pigeonholes me as an aging cyclist frump of some kind. Oh well.

Saturday, March 10, 2018

"Speed Kills" - According to the Seattle Dept of Transportation

The Seattle Bike Blog has a recent post about e-bike versions of LimeBikes that is interesting to read. The description of the apparent success of dockless bikeshare in Seattle is intriguing since their attempt at "traditional" docked bikeshare was a failure, only getting to 500 bikes available before being shut down. And now they have dockless e-bikes too.

LimeBike e-bikes in Seattle
LimeBike e-bikes in Seattle from SounderBruce on Flickr

The blog post talks about how the LimeBike e-bikes only provide powered assist up to about 15 miles per hour. This is explained as follows: In part, this is for safety and liability concerns. As the Seattle Department of Transportation regularly reminds us, pedestrians have a one-in-ten chance of death when a driver collides with them at 20 mph. For LimeBike, any crash or collision at that speed is a serious liability.

I first read that (too quickly) as having to do with the speed of cyclists, not cars, and involving cyclist crashes - thus getting two aspects wrong. Oh well. There probably aren't good numbers about how the speed of a cyclist relates to crash outcomes, but it likely that the faster one is going, particularly beyond 20 mph area, the more likely the outcome will be more unpleasant (for the cyclist - and also for whoever he may run into who isn't in a metal box).

This is why I am often unhappy with the so-far relatively few e-bike equipped bicycle commuters I see whose main goal seems to be to emulate car-like average transportation speeds on their overall commute, chugging along the Mt Vernon trail along the Potomac at between 20 and 25 miles an hour (and beyond). Counter-intuitively many such riders are highly disinclined to slow down when presented with traffic or to exercise what would seem like common sense, instead passing at the highest speed manageable with little apparent interest in anyone's safety. (Of course, this is not true of all e-bike commuters, some are a little more safety minded, thankfully.)

The speed limit for cyclists on the Mt Vernon trail (as one example) whether riding an e-bike or a regular one is 15 mph, so someone traveling at 22-24+ mph is traveling well in excess of the speed limit. Now if there is a fantastic tailwind (which is very rare with the direction of my commute) I may average 20 mph for a while but 16-18 is more typical as my high speed - also exceeding the speed limit, but only by ten percent or so, and not exceeding the 20 mph "death zone" speed.

It is also relevant that the trails are used by persons on foot, running or walking, and that the trails around here are typically not very wide or all that well maintained. The mix of 3 mph walkers and 23 mph e-bikers on these trails is not good for anyone.