Minoura Japan – VFS150G

There are two major systems on bicycle trainer; Fluid and Magnetic. Each one has its own advantages and disadvantages.

Fluid system generates resistance by spinning a turbine or cup in liquid in a sealed chamber. It features an exponential power gain that has been believed to simulate the natural headwind.
However, it is hard to control the resistance level on fluid system. You must have higher resistance automatically if you accelerate speed. And it must have many cooling fins to radiate the temperature so its production cost will have to become expensive.

Magnetic system generates resistance by cutting magnetic current between magnet and steel flywheel (Eddy Current system). Therefore, it enables to control resistance level very widely and it's free from any oil leakage. We can say magnetic is a clean system.
However, magnetic system must have opening holes to radiate the heated air flow so it was used be noisy system. But the latest technique can reduce the noise level significantly so nowadays magnetic system becomes quieter than fluid. At least, our VFS is much quieter than Kurt Kinetic.

VFS takes both advantages in just one unit; smooth resistance gain from mid speed zone by fluid, and wide variety of adjustability by magnetic.

The best system on fluid resistance unit is spinning a turbine with fins in liquid, but this very basic point has already patented by CycleOps. So any other companies are not allowed to use this most efficient mechanism.
Our VFS approaches to have a metal cup piece instead of the turbine. Cup has much larger surface area than solid columnar piece to catch more liquid at one time.

For your reference, Elite spins just a plain tiny columnar flywheel in fluid so they cannot get enough resistance.

The axiom of our world patented "Magturbo" system originally controls the resistance level by adjusting the angle of opposing magnets.
Every magnet has S-pole and N-pole. S–N combination position that the magnets pulling each other generates maximum eddy current. On the other hand, S–S or N–N position makes the magnet pushing each other, so it doesn't generate any eddy current. The stronger the eddy current, the more power we can get.
This is the basic mechanism on the typical magnetic system, but it requires a pair of magnet.

VFS adopts the simpler mechanism as same as the previously developed E-RDA rim drive system. It uses only one magnet.
A steel flywheel is located close to the magnet. Steel will be temporally magnetized when the magnet gets close. When the magnet goes away, steel will be back to neutral condition. By adjusting the distance between the flywheel and magnet, we can use the steel flywheel as if another magnet piece.

The disadvantage on this single magnet system is that it is hard to generate so wide variety of resistance. But VFS has fluid system on another side. And also we learned from our own analysis that most people prefer quietness rather than so big power.

The remote shifter can adjust the resistance level without getting off the bike during workout. It is a highly recommended feature for making your training as effective as possible.
Adjusting resistance may be able to be done by shifting the gears on bike, but it will give different taste from your desired feeling, because you cannot train in your desired gear combination. And too wide gear ratio often makes pedaling jerky due to too much pedaling torque change.

VFS150G-R comes with the newly designed convenient remote shifter device to allow you perfect training while sitting on the bike.
VFS150G is the non-remote type so there is no solution to adjust the resistance level on trainer itself. You need to change the gears on bike.

The previous remote shifter's clamping device was made of metal or plastic, so it fits round dimension tubing only and it was impossible to install on any aerodynamic carbon handlebar or stem, including clamping over the bar-tape.
The new shifter's clamp is constructed with flexible textile band so it can fit any dimension. In addition, it has quick release mechanism so installation and removal can be done in mere seconds.

The shifter lever is enlarged for much easier operation. The lever ratchet mechanism contains a thrust bearing for smoother and comfortable touch.

Gravity frame is constructed with 2 pieces; Main frame and Sub frame. They are connected each other with a single pivot, so it looks like L-shape. There is no legs to support the load on this Gravity frame.

The biggest benefit on Gravity frame is that you are completely free from the roller pressure adjustment against the rear tire.

Every stationary bike trainer frame lifts up the bike rigidly by clamping the rear hub with couplings, and the roller must come contact to the rear tire. You must re-adjust the pressure whenever you install the bike on the trainer, especially using different size wheel.
On Gravity frame, your own weight will be applied to the roller directly via rear wheel. You don't need to micro-adjust the roller pressure on any size of wheels. It's very easy to use.

The biggest negative point on any tire drive trainer is wearing down the tire. It's unavoidable destiny.
You need to adjust the roller pressure precisely on the ordinary stationary trainer for maximizing your tire life, but Gravity frame does it automatically and you are free from such troublesome job.
What you need to do on Gravity frame is just maintaining the tire air pressure. Too low air pressure will eat the tire quickly and the resistance will have to become larger.

One more benefit on Gravity frame is its natural riding feel.
Too solid trainer frame sometimes gives you unrealistic and artificial riding feel, but Gravity frame is designed to offer intentional flexibility to allow you to swing the bike side by side as per pedaling.

Our Gravity frame fits the wheel sized 26", 27" and 700c. 650c and 29" are not compatible.

The maximum load on VFS150G is slightly lower than the other models; 100 kgs including bike weight.

• The fins on the fluid side become very hot during workout. Do not touch the fins and the metal housing during session and for 15 minutes after finish.
• Do not touch any spinning part like wheel or roller. To avoid any possible injury, keep children and pets away from the trainer.
• The maximum load on VFS150G is 100 kgs including bike weight.
• You are not allowed to do dancing (hard pedaling in standing style).
• The couplings are specially designed to fit the supplied quick release skewer. We strongly recommend you to replace the skewer to the supplied one for using the trainer. We will not guarantee anything if you use your own skewer on VFS150G.
• Any bike with internal transmission type hub cannot be used.
• Hub nut type bikes can fit VFS150G.
• Not compatible with Watt-Master computer.

Training Mat 2
A floor protection mat to protect the floor or carpet from scratch and stain, and reduces the vibration to the floor up to 75%
Extra Pad Set
A set of 4 soft urethane 100 x 100mm pads. Just put beneath the trainer then reduce the vibration to the floor
Mag Riser 3
A plastic front wheel leveler block to level the bike
Safe-T Net 2
100% cotton made frame protection net from salty sweat during training
Dualist 700x23c
A specially tuned road tire to reduce the tire noise and super long life. Can be used even on road

• SKU 400-9320-00 (VFS150G) / 400-9330-00 (VFS150G-R)
• Resistance Adjustability None (G) / 7 levels (G-R)
• Flywheel Weight 1.5 kgs
• Adaptable Wheel Size 26, 27-inch & 700c
• Dimensions W 730 x D 550 x H 410 mm
• Net Weight 9.0 kgs (G) / 9.4 kgs (G-R)
• Max Load 100 kgs (including bike weight)
• Accessories Instructions manual, Special quick release skewer, Warranty policy card
• MSRP US$279.99 (G) / US$319.99 (G-R)
• Warranty Period 1 year (Mag unit) / 5 years (Frame)

Frame Color
Changed from blue to red
Remote Shifter (VFS150G-R)
Changed from plastic clamp type to textile band one

• Instructions Manual (PDF 580KB)