By supporting the pinion gear on both ends with our SA-RB bearings and integrating a bigger drive gear, X-Ship stands for Extra, Smooth & High Power. Utilising a double bearing supported pinion gear configuration as well as increasing the size of the gear, Shimano engineers have achieved an overall smoother operation whilst under load and higher power capability of reels featuring this enhancement. This increases the efficiency of your reel, meaning that it will stay smoother and perform at its peak for much longer.