The advantages of Supermoto twin disk brakes supermoto supermotard Supermoto twin disk system

The advantages of a Supermoto twin disk system

Less Heavy
The brake system is one of the lightest to date in Supermoto. Compared to a mono disc with a diameter of 310mm or 320mm, the double disk system is at a weight level of less than 400 to 750 grams versus mono disc depending on the diameter of the mono disc.

The weight of the system is distributed equally: The caliper feet have the same weight that is equally distributed on both fork stems. In the case of mono disc, the total weight is loaded only on the left stem. Another big problem is the unequal loud/bending of the fork tubes. With the Double Disc system that does not happen. Last but not least is the excessive wear of the left fork bushes, which leads to more and faster maintenance of the suspension.

Turn the front wheel
The front wheel can be safely mounted in any way, so on a track with many curves right after a few turns you can turn the wheel without disassembling the tire.

Gyroscopic force
The gyroscopic effect is a physical phenomenon that occurs in rotating bodies due to the law of intensity conservation and direction of angular momentum. This arises when the axis, around which a body is rotating, is urged to change its orientation by a force that operates on any of the planes that contain the axis of rotation.

This is the technical definition, to be more practical and to apply what we just said about the gyroscopic effect to the bike, we would have to say that the more the wheel weighs and the faster it rotates, the greater the force required to tilt it with respect to its axis will be.

This means that the aspects that influence this force are essentially two: the speed of rotation and the weight of the wheel itself. The further the weight is away from the rotation axis, the greater the resistance to motion is. To make an example: a heavier hub is not able to significantly affect the negative gyroscopic effect of the rotating wheel as a heavier tire would be able to do.

What a double disk system improves is the most external weight of the wheel, the one that is located in the furthest part from the center of rotation and that is the most critical due to its physical effect. By removing the difference in weight of the bigger mono disc, the weight of the wheel is reduced just enough to get a more responsive and fluid drive.

The data is striking: the mono disc with diameter 310mm - 320mm weighs from 1,150 to 1,600 grams depending on the diameter. The 2 disks with 240mm diameter weigh 900 grams in total. As speed increases, the grams turn into several kilograms resulting in a disadvantage of the agility in the turn. Think about it, when you travel at more than 100 Km/h and you have to bend this much weight around the corner. 

Straightening Effect
When turning, a physical effect is attempting to straiten the bike back up as a result of rotational weight. In the double disk system, that is much less. The bike seems lighter in both entering and riding through the bend. The bike is not pulled out of the curve.

Brake inside the curve
With the Double Disc you can brake and lean the bike effortless, so you can delay the brake point and increase the entering speed.

Breathe in difficult conditions
Unlike the powerful low-progressive mono disc, the Double Disc is sweeter in the braking approach, giving you almost the feeling of not stopping, turning in to the corner it makes you realis it stays glued on the asphalt without any problems. On the dirt road and on the wet asphalt you can brake without any fear. You can lock the front wheel into the ground.

In conclusion
All these benefits lead to improved lap times.