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danel Added a comment about press release Introducing Ochain - A Clever Chainring Spider Designed to Reduce Pedal-Kickback
3/31/2020 10:28am
The statement "efficiency is 100%" is a bit misleading. Sure, you may not have measurable energy loss through your device, but that doesn't mean that a rider will put as much power to the rear wheel with your device as they would without it. It's kind of like walking up stairs with springs on your feet (or replacing your chain with a stiff elastic band). That said, depending on the stiffness of your elastomer and the amount of travel that it has, I see this as being a reasonable trade-off on the climbs and strictly positive on the descents.
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This press release has 40 comments.
danel Added a comment about press release Introducing Ochain - A Clever Chainring Spider Designed to Reduce Pedal-Kickback
3/31/2020 7:16am
Pedaling and kickback are the same direction. The opposite direction is the freewheel direction.
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This press release has 40 comments.
danel Added a comment about press release Introducing Ochain - A Clever Chainring Spider Designed to Reduce Pedal-Kickback
3/31/2020 5:57am
The difference with a low engagement hub is that it doesn't hold itself 'open'. While coasting, you could have 20° of crank free play before it engages, or you could have 1°.
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This press release has 40 comments.
danel Added a comment about press release Introducing Ochain - A Clever Chainring Spider Designed to Reduce Pedal-Kickback
3/31/2020 5:54am
This is an interesting idea, but it would be horrible with a low engagement hub. Imagine you're in your 42T cog with a 32T chainring and a 18POE hub. If you ratchet on a climb, you have 26° of slop at the cranks before you have engagement. With a 12° Ochain, suddenly it's 38° before you have firm engagement. Switch that to a Hydra hub, and you start with <1° of slop and end up at ~13°. I've actually thought about doing something similar before, but my thought was to aim for a much lower rotation (like their 6° version)...
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This press release has 40 comments.