frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Open in hackernews

Rcyl – a recycled plastic urban bike

https://rcyl.bike/en/the-bike/
15•smartmic•3h ago
https://web.archive.org/web/20250912174820/https://rcyl.bike...

Comments

daemonologist•2h ago
https://web.archive.org/web/20250912174820/https://rcyl.bike...
dang•2h ago
Added to toptext. Thanks!
daemonologist•2h ago
A nearly all (">90%") plastic bike is interesting, and I guess if you're a plastics company that wants to create a bike it makes sense, but the end product does not seem very compelling to me. 17 kg, 1200 EUR, one size, proprietary parts, and only 50% recycled. A comparable aluminum bike beats it in every metric except maybe fatigue life(?).
avtolik•1h ago
My first bike bought with my first salaries (about 2-3 months) just turned 20 years old. It's a basic aluminum hardtail MTB. Still going strong - I do about 2-3k kms per year.
alright2565•1h ago
Pretty much. I thought that maybe this is an electric bike, in which case the weight might be OK, but no, this is unusable anywhere with hills.

As a quick reminder, metals can be recycled indefinitely. Plastic cannot, you always have to include some virgin material.

rz2k•52m ago
Furthermore, aluminum can be recycled with a lot less greenwashing required.
mtmail•16m ago
Reminds me of the hydrogen-powered bike from 2015, which totally made sense if your company is also a leader in hydrogen products. https://www.bikeradar.com/news/this-e-bike-is-powered-by-hyd...

"A regular e-bike battery can take several hours to charge completely, but the H2’s hydrogen cylinder requires just six minutes at a hydrogen filling station." Of course the company wanted to run the filling stations.

simjnd•1h ago
It's a terrible bicycle. If it was extremely affordable because it's mostly recycled plastic acquired for cheap, then it would make sense as a product but the 1200 EUR price tag is absolutely demented.
taitems•1h ago
Their poor little servers aren't coping well with the attention. The worst is a 1,004kb image so it's not excessively large.
mchanson•1h ago
Weight, price, drivetrain all are terrible as others have said you would be much better off spending much less on a simple al bike.
bn-l•1h ago
Recycled plastic concentrates phthalates and other toxins. The best place for plastic is modern landfill.
userbinator•53m ago
That looks like HDPE, which normally requires no plasticisers. Better learn some chemistry before spouting hysterical nonsense.

Plasticised PVC, which is where phthalates are used, is not suitable for structural applications like this.

rubyn00bie•1h ago
I don’t get this. Marketing this as an urban bike makes no sense. It’s heavy, looks like it’ll be awful to maintain because so much is custom, and it’s relatively expensive. I rode fixed gears for years because they’re light, easy to carry up stairs, and can take being knocked about or banged up by other cyclists locking their bikes up next to one.

Even something of equal weight like the legendary Surly Long-Haul Trucker is going to last longer and be more practical in every possible application. Maybe if you live somewhere costal and salt will corrode the steel or something it makes sense? I have a hard time believing this would fair better though.

gpapilion•44m ago
I would think this is for rental fleets or bike share. The weight and design would seem to make sense for that. Though the single speed seems like and odd choice for that.
KomoD•49m ago
I'm gonna be honest, it's really ugly and expensive. €1200, singlespeed and weighs 17 KG...

Also if you trade it in when it breaks, they only give you €50?

Wireguard FPGA

https://github.com/chili-chips-ba/wireguard-fpga
269•hasheddan•5h ago•69 comments

Free Software Hasn't Won

https://dorotac.eu/posts/fosswon/
22•LorenDB•50m ago•15 comments

Ask HN: What are you working on? (October 2025)

57•david927•2h ago•107 comments

Edge AI for Beginners

https://github.com/microsoft/edgeai-for-beginners
52•bakigul•2h ago•14 comments

Emacs agent-shell (powered by ACP)

https://xenodium.com/introducing-agent-shell
69•Karrot_Kream•2h ago•5 comments

Completing a BASIC language interpreter in 2025

https://nanochess.org/ecs_basic_2.html
44•nanochess•3h ago•1 comments

MAML – a new configuration language (similar to JSON, YAML, and TOML)

https://maml.dev/
15•birdculture•1h ago•11 comments

Three ways formally verified code can go wrong in practice

https://buttondown.com/hillelwayne/archive/three-ways-formally-verified-code-can-go-wrong-in/
26•todsacerdoti•16h ago•10 comments

Macro Splats 2025

https://danybittel.ch/macro.html
356•danybittel•12h ago•59 comments

Tiny Teams Playbook

https://www.latent.space/p/tiny
44•tilt•4d ago•13 comments

A whirlwind introduction to dataflow graphs (2018)

https://fgiesen.wordpress.com/2018/03/05/a-whirlwind-introduction-to-dataflow-graphs/
14•shoo•1d ago•0 comments

Bird Photographer of the Year Gives a Lesson in Planning and Patience

https://www.thisiscolossal.com/2025/09/2025-bird-photographer-of-the-year-contest/
22•surprisetalk•6d ago•4 comments

Constraint satisfaction to optimize item selection for bundles in Minecraft

https://www.robw.fyi/2025/10/12/using-constraint-satisfaction-to-optimize-item-selection-for-bund...
11•someguy101010•4h ago•4 comments

A years-long Turkish alphabet bug in the Kotlin compiler

https://sam-cooper.medium.com/the-country-that-broke-kotlin-84bdd0afb237
43•Bogdanp•5h ago•44 comments

Rcyl – a recycled plastic urban bike

https://rcyl.bike/en/the-bike/
15•smartmic•3h ago•15 comments

3D-Printed Automatic Weather Station

https://3dpaws.comet.ucar.edu
8•hyperbovine•3d ago•0 comments

Show HN: I built a simple ambient sound app with no ads or subscriptions

https://ambisounds.app/
65•alpaca121•7h ago•30 comments

AdapTive-LeArning Speculator System (ATLAS): Faster LLM inference

https://www.together.ai/blog/adaptive-learning-speculator-system-atlas
184•alecco•14h ago•43 comments

oavif: Faster target quality image compression

https://giannirosato.com/blog/post/oavif/
12•computerbuster•6h ago•2 comments

Addictive-like behavioural traits in pet dogs with extreme motivation for toys

https://www.nature.com/articles/s41598-025-18636-0
128•wallflower•6h ago•84 comments

Schleswig-Holstein completes migration to open source email

https://news.itsfoss.com/schleswig-holstein-email-system-migration/
290•sebastian_z•7h ago•93 comments

Loko Scheme: bare metal optimizing Scheme compiler

https://scheme.fail/
143•dTal•5d ago•14 comments

How I'm using Helix editor

https://rushter.com/blog/helix-editor/
168•f311a•6h ago•49 comments

The neurons that let us see what isn't there

https://arstechnica.com/science/2025/10/the-neurons-that-let-us-see-what-isnt-there/
22•rbanffy•5d ago•1 comments

HP1345A (and wargames) (2017)

https://phk.freebsd.dk/hacks/Wargames/
25•rbanffy•3h ago•0 comments

Nostr and ATProto (2024)

https://shreyanjain.net/2024/07/05/nostr-and-atproto.html
111•sph•13h ago•56 comments

Meta Superintelligence Labs' first paper is about RAG

https://paddedinputs.substack.com/p/meta-superintelligences-surprising
389•skadamat•23h ago•220 comments

After the AI boom: what might we be left with?

https://blog.robbowley.net/2025/10/12/after-the-ai-boom-what-might-we-be-left-with/
78•imasl42•3h ago•219 comments

Ridley Scott's Prometheus and Alien: Covenant – Contemporary Horror of AI (2020)

https://www.ejumpcut.org/archive/jc58.2018/AlpertAlienPrequels/index.html
49•measurablefunc•5h ago•34 comments

The Flummoxagon

https://n-e-r-v-o-u-s.com/blog/?p=9827
106•robinhouston•5d ago•24 comments