PASSIVE SAFETY DEVICE FOR A MOTORCYCLE

A passive safety device () for a motorcycle () comprises a gyroscope () configured to be engaged with a portion of the motorcycle () and to measure a lean angle assumed by the motorcycle (), a microprocessor (), and a display () connected to the microprocessor (). The safety device () further comprises an infrared sensor () connected to the microprocessor () and configured to measure a temperature value of a tyre () of the motorcycle (), the microprocessor () being configured to determine one or more safety lean angle values of the motorcycle () according to the measured temperature value of the tyre (), and to display on the display () the measured lean angle assumed by the motorcycle () and the determined one or more safety lean angle values of the motorcycle ().