If you look at the reviews here:
http://www.mtbr.com/reviews/Pedal/product_122034.shtml
People seem to split into two categories: people who haven't had them
break find them amazing, people who have had them break understandably
dislike them. The prospect of doing drops on pedals that are known to
sometimes snap is a little unnerving.
Don't be misled by the "bullet proof" nature of these pedals, either.
If you're doing a substantial drop (e.g. measured in feet), then
depending on your weight I'd estimate you could have more kinetic
energy than a speeding bullet. A friend of mine (presumably
unconvinced by my argument) worked out an estimate of this and we
figure the falling cyclist could have *substantially* more energy than
a bullet...
Therefore, from a high-level, hand waving perspective, whilst the fact
that the pedals are "bullet proof" is very impressive *they would
actually need to be*.
Of course it's not that simple in practice - bulk properties of
materials are funny. Stress concentrations due to small cracks / chips
with pointed tips can result in a crack propagating all the way through
an object - although the material may be very strong, the concentrated
stress at the tip of a crack is a lot higher than in the rest of the
material and may be enough to enlarge the crack. This continues until
the crack comes out the other side of the material - which has
effectively been cut in half. There have been a number of cases where
ships have broken in half because the square corners of their hatches
started a crack which spread all the way around the hull - simply
changing the hatch corners to be rounded avoided the stress
concentration and made this particular model of ship safer.
--
mark williamson
Dave: Just a question. What use is a unicyle with no seat? And no
pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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