When SRAM launched our road technology from scratch they reapplied their MTB proven SRAM 1:1 actuation ratio (shifter cable travel : derailleur movement) for 10 speed rear shifting. Easy Actuation helps to simplify/stabilize the uneasy act of balancing rear derailleur hanger design tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way.