This trainer features a new larger flywheel with twice the inertia for an improved, road-like feel. The power-band technology offers the widest resistance range--from easy spins to lung-burning climbs--without ever touching the unit. The infinite resistance curve ensures increased wattage as you increase speed for realistic statistical analysis at the end of your ride. The Fluid 2 is surprisingly quiet, and the self-cooling mechanisms--including a patented fan design--keep the unit performing better, longer. Includes a training DVD to help keep you motivated during your indoor exercise.