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Rotor Cranks work by slightly increasing the force required on the drive side crankarm during the pedal downstroke, using this energy to propel the non-drive crank are past the 12 o'clock point (also known as the dead spot). This happens 180 times a minute in a 90RPM ride. Or 10,800 times an hour. This might sound as if we're just transferring energy from one leg to the other, to no gain. But that conclusion is wrong: by throwing the leg in the last 50 degrees of the revolution over the dead spot, you enable that leg to apply more power earlier, leading to a net gain in power output.

With ROTOR Cranks, the cyclist can "permanently push" the cranks, as there need be no gap between when the legs take over push/recover duties, otherwise known as the dead spot. All the same, this doesn't eliminate the "rest time" for your legs, because you dont put any force into the pedal stroke in the last section of

Rotor is an innovative pedalling system that eliminates the dead point using an ingenious cam system. The dead point of conventional pedalling is the point when the pedals are vertically positioned (one at the top and the other at the bottom). At this position, neither leg can transmit any power.

The dead point limits the cyclist's performance, causes tendonitis and injuries to the knee. It is also a major source of lactic acid buildup and causes a major discontinuity during each pedal revolution. Rotor System resolves this inefficiency problem by eliminating dead points.

Rotor makes the cranks independent in such a way that they are not aligned at a fixed 180º, but rather the angle between them varies during the cycle so that one pedal never coincides with the one below at the dead point, thus avoiding power vacuums. Such an effect is achieved by the use of independent cranks that are synchronised by means of an exocentric axel and two rods, which vary the development during the cycle and adapt to the muscle power of the legs at all times. By eliminating the dead point, Rotor optimises the effort of the cyclist and reduces the risk of injury, providing a notable increase in performance and more comfortable and healthy pedalling.

The Rotor Crank system offers improvements in a cyclist's efficiency and power development, and is simple enough to be retrofitted to almost any bicycle. The Rotor system optimizes the angular rate of each crank independently in addition to providing variable effective chainring size. Varying the angular rate of the legs may sound a little odd at first, but it actually makes a lot of sense. Just as the swimmer's arm is slower when it is in the water, pulling against the load, and faster when it is recovering through the air for the next Power Phase, the Rotor System enables the cyclist to spend more time in the Power Phase. By virtue of its mechanical linkage, the Rotor System allows the cyclists to spend more time generating power per revolution. The variance in angular rate is subtle to the rider, however, making the Rotor Crank System easy to adapt to.

The Benefits provided by Rotor System have been shown in scientific studies carried out by prestigious international universities. The results demonstrate that Rotor achieves a real increase in power of up to 16% (equivalent to an average advantage of 3 minutes in an hour on flat ground), as well as a reduction in lactic acid and cardiac effort. The three main benefits are:

a) Reduction of lactates: Rotor reduces the concentration of lactates in the blood thanks to greater muscular efficiency, thus reducing fatigue.

b) Reduction of cardiac effort: Consequently, as a result of the reduction of lactates in the blood, the demands on the cyclists cardiovascular system are lowered.

c) Reduction of knees injuries: Conventional pedalling subjects the knee to great articulatory stress when the leg is pushing on the upper dead point. By eliminating the dead point, Rotor reduces the typical knee injuries of the cyclist, due to less stress on the knee tendon. Thanks to the variation of the gear ratio during the cycle, the push is more progressive and the articulatory stress is more uniform.

How Does Rotor Cranks Work?

the upward stroke, and the improved ergonomics of Rotor System Cranks lead to a reduced production of lactates in the stroke, making the "rest zone" less to unnecessary . This elimination of the dead spot allows the rider to produce more wattage and improve his/her lactate threshold. The extra wattage is converted to speed in the amount of 2-3 minutes per 40km. This is the difference between being 1st on the podium, and not even being on the podium in many races.

The difference is even greater when going uphill and accelerating.  This is beacuse the power required to overcome wind resistance increases to the third power of rolling resistance as speed increases. In practice, this means that the increased power generated by ROTOR cranks will have a much more noticeable effect when the rider's wind speed is lower. As a result, you will also see significant increases in your climbing speed and a big improvement in sprints from standstill (like when starting at a race, or accelerating from an intersection) once you have switched to Rotor Cranks.

What Are Rotor Cranks?

How Effective Are Rotor Cranks?

S$950 with installation