Not only answering the need for the Eagles greater capacity, the Sram X01 Eagle Rear Mech is also the evolution of Srams proven, 1x specific X-Horizon design to offer the smoothest shifting experience. A new larger 14T X-Sync lower pulley allows the 10-50T capacity of the Eagle Cassette in a realively compact design & boosts the smooth pedalling feel of the new groupset. Type 3 Roller Bearing Clutch technology now uses a smoother torque curve to offer the same quiet ride by eliminating chainslap but is now more consistent in both operation & feel. Description by Mark, Rutland Cycling Web Team.