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Off road riding, especially the fun stuff,
invariably involves navigating over gnarly terrain like rocks, water
bars and greasy tree roots. Being
able to unweight your rear wheel, or even "bunny hop" your
bike into the air is a damn handy trick. You'll be able to travel faster,
avoiding nasties like snake bites (compression punctures) and buckled
wheels, plus it looks dead cool.
Lifting the Rear Wheel
The Zen principle behind this number is to make your handle bars accelerate
faster than the front wheel. To get a feel for the sensation - leap
off your mount, grab a fistful of front brake so the wheel locks
up, and twist the handle bars forward, pushing the bike over its
front wheel. The rear wheel will lift off the ground.
Then try it without using the brake - by gripping the handle bars
tightly and rolling your wrists forward with an explosive action.
Now try the real thing. Find a smooth, flat area and ride at a moderate
speed in a straight line. Now ...
1. Grip your handle bars tightly, so your knuckles are white!
2. Get out of the saddle and move your weight forward until your head
is well forward of the front axle. Your arms rather than your feet
should now be supporting most of your body weight.
3. Twist the handle bars and push the bike forward with an explosive
action (don't touch the brakes or you'll stack it big time).
4. Your legs should be relaxed,
bent slightly to allow the bike to rise under you. The rear wheel will
momentarily lift off the ground
- a scary sensation but fear not ... you're unlikely to head over heels.
As you push the bike forward your body automatically moves back to
return the rear wheel to terra firma.
Note that the differential between
your handle bars and saddle should be 25-50mm. If your bars are too
low, you will suffer from reduced leverage making the whole manoeuvre
even harder.
Once you've got this mastered, try combining
it with a front wheel lift (see lifting front wheel). This is the go
for clearing drains, logs etc.
at relatively slow speeds.
Bunny Hopping
But when you've got the hammer down ,there's just no time to lift your
front and rear wheels independently. You need to hoist the entire
catastrophe into the air in a single movement. Intuitively people
do this by yanking up on their pedals and handle bars. While this
does work after a fashion, it's preferable to link the front and
rear wheel lift together in a single fluid motion so you arc over
the obstacle. Here's how ...
1. Lift your butt off the seat and move your upper body forward and
down over the handle bars. This compresses your body like a loaded
spring, plus it compresses the front tyre and shocks.
2. Explode upwards or apply a "power stroke" to
bring the front wheel up.
3. Then as with the rear wheel lift above - twist the bike forward
over the front wheel while it is still off the ground. This will cause
the front wheel to lose some height. Remember to keep your legs relaxed,
giving the bike room to float up under your body.
4. Extend your arms and legs to absorb the shock on landing - and
hopefully you've already considered the drop zone in your pre-launch
checks.
The bike will effectively out accelerate your body - starting behind
you, and finishing ahead of you. You shouldn't need to pull up on your
clip-less pedals - BMX and trial riders leap amazing heights with flat
pedals. In fact it's advisable to master the bunny hop without your
SPD's so you don't get tempted into bad habits. Practice is everything.
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