Frank Krygowski wrote:
:On 4/12/2018 6:20 PM, David Scheidt wrote:
: Frank Krygowski wrote:
: :On 4/12/2018 3:54 PM, AMuzi wrote:
: : From the sublime to the ridiculous
: : or
: : Best thing since sliced bread
: :
: : https://www.bikerumor.com/2018/04/09...ord-groupsets/
:
: :yawn Still just integer steps between gears, like everybody else.
:
: :Let me know when they develop cogs with non-integer numbers of teeth.
: :Only then will the ratios be close enough. Sometimes you really want
: :that 11.5 tooth cog!
:
: Abut a decade behind...
: http://www.nuvincicycling.com/en/products/nfinity.html

:Good point. I've known about NuVinci for quite a while.

:Based on the operating principle, it seems to me the NuVinci would be
:draggy, and online comments hint that it is. This site
:https://www.cyclingabout.com/speed-d...arbox-systems/
:claims only 83.5% efficiency (although I don't see the NuVinci curve in
:their graph). 83.5% is really low.

:Has anyone here ridden one?

Once, on a heavy cargo bike, with a passenger. I couldn't tell if the
their was an efficency issue, or just the "I'm riding a 500 pound
bike!" problem.


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