[Yak] Momec Drive

[Geof Gee]

Of course mixing the two -- derailer and planetary drives -- makes
sense if there is an issue with mounting a front derailer.  

With a quick search it looks like the Schlumpf drive can be bought for
~$500 while the Nexus 8 Redband for ~$200.  The Rohloff is available
for ~$1150.  While both are expensive, that is still a big difference
in price.   

Note that I recall that the Speed Drive needs a mill cutter for
installation.  So is it the case that the additional labor and tools
make up the price difference between the two alternatives?

BTW, I recall that there is a 5-speed internal drive crank that someone
installed on a Strida a few years back.  It was done in Japan so the
details are Babel Fish fuzzy.

-G

> 
> It sounds similar to the Schlumpf drives, only with 3 speeds instead
> of 2.  Schlumpf has been around for about a decade and their products
> have a good reliability record.  They don't put all of the gearing
> inside the BB shell, it is next to the BB shell inside of the
> chainring.
> 
> The Speed Drive or High Speed Drive are the units that makes the most
> sense for Bike Friday: 
> http://www.sheldonbrown.com/harris/schlumpf.html
> 
> I personally don't like mixing derailleurs and planetary systems, so
> I'm not a big fan of the Dual Drive.  The Schlumpf can be used to
> extend the range of a cheaper 7, 8, or 9sp internal gear hub, but the
> resulting system will be less efficient than a Rohloff at nearly the
> same cost.
> 
> alex
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