Bike Binder VR is free on GitHub and players only need a stationary bike with movable handlebars and a VR headset. The left controller is attached to the left foot, and the right controller is attached to the handlebar. The controller on the foot detects pedal speed and transmits it to the bike in the game, while the controller on the handlebar performs other actions like jumping, braking, and changing the camera.
Bike Binder VR was developed for stationary bikes with movable handlebars. However, the application could also be made usable on regular indoor bikes as well. A new mode is under development in which the players hold the controller in their hands and steer with the joystick. The application is supposed to be compatible with various VR headsets.
More information:
https://mixed-news.com/en/biking-in-vr-this-app-makes-it-possible/