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Chain drivetrains are really simple, easy to maintain, mature and efficient. The efficiency is biggest point for racing, for commuting maintain and simplicity are probably the biggest points and there's a lot of interest in belt drives that are almost as efficient (or about on par in single speed setups) and almost maintenance free.
As it turns out, it's very difficult to come up with new better system than simple chain drivetrain.
Do these bikes actually exist? All the links at the bottom of the wiki go to some shitty blog (and he's doing reviews of bikes with regular chains).
I'm also getting a strong "AI generated" vibe from this blog. A few years back I worked at a company that had this idea about auto-generating web sites. Basically they were already in the "domain squatting" business, but wanted to make more use of those domains than just showing the usual ad-filled parking page, so they wanted to have an algorithm that would see the word "bike" in the URL, then take a bunch of pre-written blog posts about bikes from their database and drop those onto the page to make it look like somebody was curating a blog about bikes.
The project got scrapped largely because it relied on poorly paid writers to produce all those blog posts, and to make them generic enough that they'd look native to that site while still not looking overtly generic. The company couldn't find a good balance between how much they had to pay for decent quality vs. how many articles they needed to scale to. I bet ChatGPT gave that idea new life though.
I'd also be wondering about how easy it is to break whatever rope or what not they are using. Cause if it's some really expensive rope or what not that'd probably be more expensive than the gear and chain anyway and if it's not than how easy is it to replace and how expensive would it be.
Interesting concept, although it seems like one of the biggest "why though?" projects ever. Very interesting idea, but probably overengineered and expensive.
Seems like the only benefit is you don’t have to slow your pedaling when changing gears?
A CVT seems like a better alternative though, and has been done before. They’re just heavy and expensive for bikes. https://en.m.wikipedia.org/wiki/NuVinci_continuously_variable_transmission