All participants must be to class 5 minutes prior to class start time to reserve your spot and for proper bike set up Experience The Ride Of Your Life. This is a 30 minute RPM class. RPM is a fun, athletic, cardiovascular cycling workout that kills calories in record time – up to 600 in a single ride. Devotees know RPM as the rock concert on wheels. It provides lightning quick improvement in endurance and a fast boost of lower body strength.