The nordic track gx pro indoor cycle is the perfect home spinner bike this bike has a smooth flywheel at the front to provide a constantly smooth resistance as you cycle this bike is very portable it has two wheel on the front of the frame that make this spinner easy to move from place to placewhen you purchase the nordic track gx pro indoor cycle you get a chest belt included this is so you can measure your heart accurately and wirelessly so you can stay in the correct training zone key f