Looking for a direct drive smart trainer? FLUX S Smart is the ideal companion for indoor training compatible with your favorite apps. Get the most out of your most intense workouts by training on realistically simulated climbs up to a 10% gradient. Track your performance and progress with reliable and consistent measurements. It includes power, speed and cadence, measured with accuracy within 3%. FLUX S Smart communicates via Bluetooth® Smart technology and the ANT + ® FE-C protocol, so it is compatible with a number of popular training apps, such as TrainerRoad and Zwift.