My Koga has an Enviolo stepless bicycle automatic transmission, which frees me from thinking about shifting, so I can pay more attention to riding safely and effortlessly.

https://news.ycombinator.com/item?id=48761621

DonHopkins 44 days ago | root | parent | prev | next [–]

Enviolo stepless bicycle automatic transmission (never manually shift again, accelerate while continuously shifting under load), with a carbon fiber belt drive (maintainance free, silent, never get grease on your pants or hands again), and Bosch Performance Line mid-motor (strong zippy performance from the geniuses who paid a €90 million fine for Dieselgate), plus GPS tracker with "recovery service" (required for insurance).

https://enviolo.com/

https://www.youtube.com/watch?v=TQrgKBQrkag

https://www.youtube.com/watch?v=6xY2S-9gjHI

https://www.koga.com/en/enviolo-gear-hub

https://www.koga.com/en/bikes/e-bikes/evia-pro-automatic?fra...

It's a dream bike, optimized for comfort and city riding, but Koga is not available in the US, though.

Here's an American bike that has similar features (not as nice as the high-end Koga Evia Pro Automatic though), the Harley Davidson Rush/CTY (step through model is easiest to mount/unmount/ride):

https://www.youtube.com/watch?v=4SjN8RN9g7Y

https://www.youtube.com/watch?v=KoX9S5UhETE

https://serial1.nl/

The Enviolo Automatic also come in a heavy duty version paired with high performance motors for bakfiets (cargo bikes), for 3-4 children, big dogs, and groceries:

https://batavus.com/en-nl/products/fier-3-bbfn3

https://www.dw.com/en/bosch-pays-90-million-euro-fine-over-d...

https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal

Edit:

Fair, they're ideal for city bikes, stop-and-go traffic, and the flat Dutch landscape where they're produced, where the biggest "mountains" you encounter are the bridges over canals. Their city model has 310%, trekking 380%, and the new utility hub has 400% gear range, which you can use on a normal bike, bakfiets, or speed pedelec.

https://enviolo.com/news/enviolo-launches-the-utility-hub/