I have to say that the peformance cost\benefit ratio of these cranks does
not impress. I've read many reports of the utter agony that they induce,
and thus reduced total training volume. The problem here is that the cranks
are mechanically sound, but not biomechanically. From an anatomical
perspective, the hip flexors' power potential will always be dwarfed by that
of the hip extensors. Thus, a rider will never be able to apply power
symmetrically around the pedal stroke. To try to force the body to achieve
this improbable goal is time poorly spent, in my opinion.
I believe a better approach might be rotor cranks, which appear to address
the inherent inability of the human body to apply power symmetrically. The
concept is similar to biopace chainrings.
To summarize, I think this is why we are seeing slightly used powercranks
for sale, as their users have determined that the cost/benefit is too large.
--
--------------------------
Andre Charlebois
AGC-PC support
http://agc-pc.tripod.com
BPE, MCSE4.0, CNA, A+
"Robbie Brown" <
[email protected]> wrote in message
news:
[email protected]...
> For sale. Like new Power Cranks. Only ridden three times for about 2
> hours of total ride time. 175mm length for a shimano splined bottom
> bracket. These sell for $690.00 new without chainrings. I will
> include 53/39t chainrings for $575.00 shipped in the U.S. Check out
> www.powercranks.com for information on these cranks.
