this post was submitted on 29 Sep 2023
5 points (100.0% liked)

Based Count General Discussion

52 readers
1 users here now

Welcome to the Based Count General Discussion, a community where you can talk about anything and everything that is not covered by other communities on this instance.

For requests about the creation of new communities, head over to our stickied thread in [email protected].

Rules:

  1. No hateful content:
    while we highly value free speech, content explicitly targeted against users isn't tolerated. Sarcasm and edginess are accepted.
  2. Start a discussion:
    link posts should contain a few lines of context, your opinion on the matter or a TL;DR. Don't post naked links.
  3. Mark NSFW content; don't post porn:
    NSFW posts are allowed, as long as it's properly marked. However, porn is NOT allowed.
  4. No spam:
    Avoid repeatedly posting the same content or links already shared by others.

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
5
Stringbike: Chainless Bicycle Design (infogalactic.com)
submitted 1 year ago by [email protected] to c/[email protected]
5 comments fedilink hide all child comments
 

The Stringbike is a bicycle that uses a rope and pulley drive system instead of a traditional bicycle chain and sprockets.[1][2][3][4] It uses two Dyneema ropes attached to pulleys attached to swinging lever and cam mechanisms, one on each side of the bike. These mechanisms replace the round sprockets found on chain-driven bikes. Unlike some traditional 10-speed gears using a derailleur, there is no slippage when changing gear ratios.[5] The Stringbike uses a 19 gear ratio system with no duplicates and a total gear range of 3.5 to 1. The transmission ratio can be changed with a shifting knob located on the right-side handle grip. Gear ratios can be changed even when the bicycle is almost stationary.[6]

Hungarian designers from the manufacturing company Schwinn Csepel Zrt, unveiled the bicycle in 2010 in Padova, Italy.[7]

It never caught on so possibly isn't better than a chain design, but maybe it simply lacks popularity or the idea might be made use of for some other application

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 2 points 1 year ago (1 children)

Interesting concept, although it seems like one of the biggest "why though?" projects ever. Very interesting idea, but probably overengineered and expensive.

[–] [email protected] 1 points 1 year ago

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