Kettler Giro S3 Upright Bike

The Kettler GIRO S3 Programmable Upright Exercise Bike combines smooth magnetic resistance with a more advanced computer enabling automatic resistance level changes.  One can simply select one of the preset programs and the bike can automatically simulate riding through undulated terrain.  Another option is to select the heart rate control program and the computer will keep track of your heart rate and make automatic resistance changes such that you heart rate will achieve and stay in your ideal training zone.