Chain tensioner that doubles as non-turn washers for Alfine

In article
,
Andre Jute wrote:

On Nov 13, 8:32*pm, Michael Press wrote:
In article ,
*Dennis Ferguson wrote:



On 2008-11-13, Michael Press wrote:
In article
,
*Chalo wrote:
Fallbrook's NuVinci hub costs a third what Rohloff's does, about half
again what Shimano's does, and it is quite a bit more sophisticated
than either one. *I reserved judgment on this point until I got to
ride one. *It's a nice piece of work.

I eventually gave up the search for details on the gearing.
The limit of chainwheel to hub sprocket is apparently 2:1.
No site that I visited gives the upper and lower ratio of the
hub itself.

The data sheet and manual seem to be he

* *http://www.fallbrooktech.com/08_Bike_Specs.asp

The data sheet says the hub's range is 0.5 to 1.75.

Okay. That means the lowest gearing is
27 gear inch to 94.5 gear inch.
Higher up is 37 to 130 for you 53/11 aficionados.

I do not suppose anyone knows the losses in the hub
at various gear ratios. *
The rolling spheres are efficient. *
The art is getting the reaction plates to flex minimally:
4500 gram of steel could do it.

An ounce short of ten pounds. You should cultivate your sense of
irony, Michael,

I do not have one to cultivate.

but meanwhile take your tongue out of your cheek -- it
makes your wisecrack too obvious.

I am entirely serious.

A variability of about 3.1 or 3.2 to 1, IIRC (while since I looked

Waiting for someone to correct your arithmetic?

into it as an alternative to Nexus IGH) is not bad, really, about the
same as the Shimano hubs.

I certainly how NuVinci provides a soft twister, because the
temptation would be to keep your hand on it. It may be high time for
IGH makers to cobble up a motorcycle type gear change, where the whole
grip rotates.

--
Michael Press