This cam comes standard on all sizes of Torsa reels. It is an "all-around" curve with many uses. The L.R.S. curve was originally designed for the Tiagra for anglers on the Long Range boats out of San Diego. These anglers required high maximum drag capabilities in smaller reels to catch large Yellowfin Tuna in standup situations. The result is a steep curve to allow use of heavy lines while maintaining Freespool.