Virtual bicycle ergometer training is an effective and complementary exercise to road cycling training. Many cyclists, mountain bikers and triathletes, including Olympic and world champions, successfully use the Cyclus2 as a training device. The Cyclus2 is compatible with VirtualTraining, a virtual ergometer training platform. Using this system, Cyclus2 users can ride realistic virtual routes on Google Earth’s 3D maps © with route videos displayed simultaneously, synchronised with the cyclist’s actual travel speed. By using its own bicycle in elastic suspension, the Cyclus2 is the ideal device for simulating training or tournament routes. Unlike other ergometers, the Cyclus2 accurately calculates braking resistances during indoor training as they would appear in a real-world scenario (air resistance, downhill force, rolling friction).