This bit of video, courtesy The Independent, impresses me greatly. It’s a new design for a bike, but a bike which doesn’t use a chain:
The bike instead uses a shaft-drive system to transmit power from the pedals to the wheel. … Manufacturers claim it makes power transfer more efficient.
I’m guessing that, if that’s true, this is made possible by new materials, and in particular by plastic that is both very light and very strong.
I particularly like how they include a multi-speed gear, just by having a cog-wheel that shifts along the shaft.
It will be interesting to see if this really is an improvement which catches on, or is merely an internet-friendly idea that turns out, for various simple or complicated reasons, not to be any use.
Says the first (cynical) commenter: it’s not new, and …:
Everything works in a lab.