It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.

[two9a@hachyderm.io]

@KingmaYpe @markhburton Which would be 0.0086 calories per kg per km if you're a hundred kg's and jump on an ebike.

That's below the bottom of the Y-axis on this chart, by some distance.

[luc0x61@mastodon.gamedev.place]

@Two9A Curious that electric trains aren't mentioned, given the low friction and efficient transmission of power. Maybe because it was an abandoned transportation in the 1970s America, to support the combustion engines local industry.

[kingmaype@mastodon.green]

@Two9A @markhburton

Times 20, but still off scale.

[lpryszcz@genomic.social]

@Two9A where do train and bus fall?

[two9a@hachyderm.io]

@lpryszcz Elsewhere in this thread, calculations are floating around of 0.3 cal/g/km; that'd be on the scale of an aircraft (or above that) in weight, but more energy efficient.

[laughingcoyote@social.vivaldi.net]

@Two9A I recall Astronomer Carl Sagan in his promotion of the bicycle as the most efficient mode of transport said that if the surface of the earth were glass (meaning very flat and smooth), lizards would have evolved wheels rather than feet. An additional element is that the power source of the bicycle and the the passenger(s) are the same, self-contained, unit, so you don't have to move around a power source, much of the drive train, container, as well as large tires to support this load in addition to the passenger, which also minimizes friction in both the wheels and airflow. Probably a key element in energy efficiency then becomes the energy subsidies in the food source, but this holds for both bicycle and other other forms of transport as people must eat to sustain themselves whether or not they ride bicycle to get around. Furthermore non-bicyclists require exercise separate from their transport to burn off stored excess energy and sustain their health which adds additional energy costs including transport to and from the gym, and even more if they don't exercise and are forced to utilize the highly energy and resource intensive medical system to keep themselves functioning. I'll note my wife is going on 88 years, riding a bicycle between 10 and as much as a hundred miles a day, despite knee problems walking.

[failedlyndonlarouchite@mas.to]

@Two9A

if you believe wikipedia, an electric bike is 3x as efficient as a regular bike

Energy efficiency in transport - Wikipedia

(en.wikipedia.org)

but this suggests that the ebike and escooter numbers maybe false

(www.reddit.com)

Transit buses suck, per this
https://afdc.energy.gov/data/10311

[oddhack@mstdn.social]

@Two9A I hope those are small calories. Maybe in another 52 years they can update to SI units.

Would be interesting to throw in the amortized acquisition and maintenance energy cost/km of road / bike path surfaces, and of the various vehicles, as well.

[earsmeardius@mastodon.social]

@Two9A pogo stick is sadly neglected these days.

[lovestha@floss.social]

@maccruiskeen @Two9A @KingmaYpe Riding your bike to Europe will come out ahead too, even if you only ride the bits that are on land.

[kbal@fedia.io]

Bicycles are the best on land, but nothing beats a sailboat for moving along without any effort.