check these crazy bikes out!







FAQs:
Q: What's new and different about these bikes?
A: You can jump from any level road, at any time, without a ramp.
Q: What makes the bikes jump?
A: Squeezing the lift handle engages the lift mechanism.
Q: Can you ride it like a regular bike?
A: All day long. Just don't squeeze the jump lever.
Q: Can anybody jump using these bikes?
A: Practice is needed to do good, clean, high jumps.
Q: What if the rider isn't going fast enough to jump off of the ground.
A: Then it feels like you rode up and over a 10" high speed bump.
Q: What other "killer riding experiences" are there?
A: Normally the ride is like you're on a cloud, with ten inches
of float. Some versions can latch to ride high all the time.
Or latch to ride low all the time.
AIR TIME is the bike in our patent, US 6,209,899. But all the bikes change
kinetic energy (energy of mass and speed) into potential energy (energy of
mass and height). Like when a pole vaulter changes his running speed into
height and clears the bar. Or when you run and grab a rope attached to a
high tree branch. How high you can go depends on how fast you were running.
AIR TIME uses the front wheel to lift the front end on long fork stanchions,
while also pulling the rear wheel down by means of a cable. This produces a
unique flat jump. Unlike rotating up onto a ramp front-wheel-high and then
landing rear-wheel-first, like a normal jump.
But this configuration puts far too much stress on the front fork and head
tube. All other versions use the rear wheel to power the jump.
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OPERATION OF THE JUMP BIKES:
These all jack-knife the bike frame to thrust the bike frame and rider up
from the road to power the jump. Like when a rider does a "bunny hop" on a
BMX bike. They first throw their body up and then pull the bike up with them.
As the rider is being lifted using these jump bikes, the increased force
down on the road increases traction, which is exactly what is needed! The
rider can also pedal during the lifting action to add height to the jump.
The lift spring is essential to produce a jump. And it must be matched to
the rider's weight.
To initiate a jump with AIR TIME, the lift sprocket, which always turns with
the front wheel, is pushed over to a dog clutch and engages it. Next, the
lift shaft turns the lift crank. Then the frame is pushed up by the pushrod.
This thrusts the rider up and produces the jump. A 10" lift of the bottom
bracket occurs in about 50" of forward motion. This geometry produces good
jump action while maintaining good road traction, but without creating undue
braking reaction.
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The procedure for any jump is to get up to speed, shift weight in line
with the lift axis, draw the feet into the stirrups, squeeze the lift lever
and then let the bike launch the bike and the rider up. Continue to hold the
lift lever. Land and let the lift mechanism push the bike forward as it
drops to the low position. This is like dropping onto the back slope of a
10" high, 50" wide speed bump. Release the jump lever when the bike is fully
down.