On 6/6/2019 7:28 PM, John B. wrote:
On Thu, 6 Jun 2019 09:11:13 -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.

I can just imaging what road grit when it rains will do to those exposed bearings and interface. Can we say RAPID wear?

Cheers

Probably about the same as those exposed chains and sprockets when it
rains and they get all muddy :-)

As we know, sprockets and chains do wear, largely because of the
exposure to road grit.

But chains are cheap commodity items spit out of machines at a rate of
thousands of miles per day. Sprockets are essentially flat stampings,
now with some minor ground-in contours. Nothing necessarily expensive there.

The thought experiment that's being proposed would require lots of
complex 3-d machining. It's not going to be cheap to replace worn bits.
But no worries. It's never coming to market.


--
- Frank Krygowski