eenwieler wrote:
> *i should go for the KH24 in your case. But in my case I
> will safe a lot of money and buy a stronger one because I
> have already bent my KH crank ( after 3 months
) So if
> you do a few drops. Not very big ones, you bent you crank.
> I have jumped 4 thimes of a 5 foot skate ramp. So it isn't
> strong enough.
>
> Ferko *
A five foot drop to flat is pretty big. If you don't roll
out properly on a drop that big you're going to be bending
or breaking cranks. I'd bet you could even break a Profile
crank if you do repeated 5 foot drops to flat with poor
technique.
How smoothly can you land a 3 foot drop to flat? Can you
roll it out every time? Do you land with a thud and a double
bounce? Are you able to land lightly and collapse your body
to absorb the impact?
Technique has a lot to do with how well your unicycle will
survive big drops, especially to flat. If you're a big guy
and you land big drops like a ton of bricks, you're going to
be breaking or bending almost any crank.
I can do 3 foot drops to flat fairly smoothly. I still
sometimes mess up and land poorly, but most of the time I
land them smoothly. I don't land 4 foot drops as well. I'll
land and sometimes get a double bounce because I don't roll
out and/or collapse my body properly to absorb the impact.
Until I can get 4 foot drops as smooth as my 3 foot drops
I'm not going to do anything higher.
KH cranks can handle 5 foot drops. Kris uses KH cranks now
and he does big drops. He just lands all of his drops very
smoothly. If you're 180+ pounds and you land a 5 foot drop
poorly, yeah, you probably can bend the crank.
Adding just a foot to the drop height adds a lot of
additional energy that needs to be absorbed. It's an
exponential increase in energy. Doubling the height does a
lot more than double the amount of energy. I'm too lazy
right now to go get my physics book to find the exact
equation, but I know it's exponential.
Anyways, if you're bending cranks like the KH cranks it
would be a good idea to get real smooth at smaller drops
before going for the bigger drops. The alternative is to get
a Profile hub and Profile Dirtjumper cranks and hope for the
best. But even Dirtjumper cranks can break.
--
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