Sigma ROX 9.1 Multi-Function Bike Computer - BlackSigma ROX 9. 1 Multi Function Bike Computer Black This ROX 9. 1 bike computer from Sigma offers not only all the functions of the 8. 1 but also a LOG function with an expanded memory capacity of 90 hours and comprehensive trip data evaluation options. The GHOST RACE function, which can be used to race a route against yourself in real time, is a particular highlight. General functions include: 5 available languages, 2 adjustable wheel sizes, automatic