On Sun, 2 Jun 2019 05:36:35 -0700 (PDT), Sir Ridesalot
wrote:

On Sunday, June 2, 2019 at 8:18:56 AM UTC-4, John B. Slocomb wrote:
On Sun, 2 Jun 2019 04:42:01 -0700 (PDT), Sir Ridesalot
wrote:

On Sunday, June 2, 2019 at 5:49:03 AM UTC-4, John B. Slocomb wrote:
See https://www.youtube.com/watch?v=-9gQ1KRhesM

In the narration he mentions that a 24 speed gear set, or even more,
would be perfectly feasible. No wires, no cables, either.
--

Cheers,

John B.

Seems to be a concept bicycle not an actual bicycle. I'd like to see how the bicyclist initiates a shift. I'd also like to see it in actual use.

I wonder what the cost will be?

Cheers

In the latter part of the narration he explains the shift. It is a bit
complex as it apparently uses different "Paths" on the "cassette"
depending on the speed of rotation.

see https://www.youtube.com/watch?v=UFAQ6CzNm7s
for a repeat of the above reference or google on "CeramicSpeed Driven
chainless drivetrain" for about 11,000 hits.

Apparently they have built at least one complete bike as one of the
sites has a picture of someone riding one
https://hiconsumption.com/2018/07/ce...ss-drivetrain/

In reading the fantastic claims for reduced friction one should
remember that a chain drive may well have as high as 98% efficiency.
https://www.cyclingpowerlab.com/Driv...fficiency.aspx
So essentially the Ceramic system may provide 1% greater efficiency
than a well functioning conventional system.

--

Cheers,

John B.

But HOW DO YOU SHIFT? Is it a lever, a grip shifter? What?

Cheers

The first reference I gave said that the "drive shaft" contained a
remote receiver device which allowed shifting without wires or cable.
No reference seems to have been given regarding the actual shift
button, lever, whatever.

--

Cheers,

John B.