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The XTerra Fitness SB 540r Indoor Stationary
Magnetic Recumbent Exercise Fitness Bike
Q: What makes a
recumbent bike a magnetic recumbent bike?
A: The use of magnetic eddy currents in the braking
A magnetic eddy current brake or "magnetic ECB"
capitalizes on the magnetic field anomaly called an
Much like the way eddy currents form in water, the
eddy currents around a magnetic field create their
own swirling effects and their own magnetic field.
Those eddy currents can be used to create a braking
effect by using the resistance of these eddy
currents to oppose the rotational direction of the
flywheel on the recumbent exercise bike.
I'm not an electrical engineer so I thought perhaps
a diagram might help illustrate how a recumbent
exercise bike becomes a magnetic resistance
recumbent exercise bike using magnetic ECB for
Magnetic Eddy Current Braking Diagram
The eddy currents that are generated are
perpendicular to the flywheel's direction of travel.
In the case of magnetic eddy current brakes, the
metal flywheel is exposed to a magnetic field from
an electromagnet, creating eddy currents in the
flywheel. The eddy currents meet resistance as
charges flow through the flywheel, and this acts to
slow down the rotation of the flywheel.
Interestingly, the faster the flywheel is spinning (RPMs),
the stronger the effect, meaning that as the bike
slows the braking (resistance) force is reduced,
producing a very smooth 'braking' action which
results in extremely smooth transitions between
Let's use the XTerra SB540R Stationary Recumbent
Bike (which has a larger flywheel) as an example.
When you use a preselected program or set up your
own user program - you can specify the resistance
levels for each segment of the fitness program.
So, let's say you use the control panel and
choose to begin your workout with a resistance
level of 5 for the first segment, 9 for the
second segment and 16 for the third segment thru
the sixth segment and then step the resistance
back down to warm down; instead of feeling
abrupt and rapid changes in the transition
between the different resistance levels - you
will feel a gradual change in the resistance
level that is very comfortable to adapt to.
Knowing how each type of resistance mechanism works
will help you make an informed decision before you
make a purchase.
Magnetic ECB resistance mechanisms are
becoming increasingly popular. In the SB540R
magnetic recumbent bike, the magnetic currents track
the resistance level so that you can make the
necessary adjustments depending on your preferred
level of intensity. A magnetic resistance bike offer
more because they are easier to adjust, have a more
sophisticated resistance level, smoother to use and
are quieter than other types of resistance
Tension and Direct Friction resistance
mechanisms are decreasing in popularity and actually
harder to find. They are awkward, noisy and use
actual friction of moving parts to adjust the
tension level and they required the rider to make
Resistance mechanisms were very popular before
the turn of the century but they too are decreasing
in popularity. Air resistance bikes work by using a
fan blade to create resistance.
The XTerra Fitness SB540R has a more heavily weighted
flywheel resistance and an extremely smooth belt driven
feature - Very Quiet to ride - very easy to adjust with
a few touches on the control panel. Smooth transitions,
quiet and comfortable, easy to adjust on the fly,
affordable, reliable and low-maintenance recumbent
cycling in the comfort of your own home.
Limited Time Offer XTerra
SB540r Sale Price is Only $899.00*
Sales Tax for NY Residents
What are you waiting for!
Contact us today to Order Your
XTerra Fitness SB 540r Recumbent
Lyle is our online exercise equipment manager
and you can reach him in any of the