Several changes were made in the magnet and disk in order to improve the system
The new disk is completely smooth, and the magnet has integrated the poliurethene pad. This configuration allows to produce more accurate breaking, as well as more homogeneous wearing (less prone to inbalance). Also the gap between the disk and magnet can be lower with less wear, which provides more durability and increased braking power.
Like the first version, the friction is between the disk and poliurethene pad (never metal to metal). This is to avoid any possible residual magnetism, and allows the main wheels be released completely free when the brakes are turned off.