Feature Friday: Strive™ Airbike with VPR Technology 🚴 One bike, endless resistance options. With variable pitch blades, you can dial it down to level 1 or 2 for a light, easy paced ride, or crank it up to level 7 or 8 for brutal power output intervals. That means your long, slow steady state sessions and your toughest high intensity work all live in one machine.