Braking Epta Batfly Rotor - BY4123E

Developed from an evolution of the original Batfly disc. The outline rotor has increased the performance of actual Batfly thanks to the introduction of a new coupling system between rotor and carrier.
Same BATFLY geometry with directional non round profile. The carrier is made of ALUMINUM AL7075-T6. This allows for an optimized shape, reduced weight & higher rigidity, with introduction of a new style.
Improved rotor to hub load transfer: The classic hubrotor coupling system, the pins, are substituted with new connecting components, avoiding deformation and floating variability during product life.
The new rotor-hub coupling geometry, that allows the rotor stems to slide in radial direction, improves the response to stresses and deformations at high temperature. More homogeneous disk temperature without increasing the weight.
The feeling of the rider is improved and more direct. The new rotor-hub coupling system is more direct and the two components are in constant and direct contact. This means that the rider feels a powerful and effective brake from the beginning to the end of the braking event.
Main MXGP riders declare an improved feeling and power of the brake system using the new EPTA discs.