Backside anti-roll club for ball-bearing roll club mounting system and redesigned to work well with the X4 back suspension system fingers. The anti-roll club system is installed towards the back bulkheads via bearings from outside for extra-smooth motion as well as for fast & simple changes and modification. The roll club turns in ball-bearings for optimum accuracy and free movement. Anti-roll club height is adjustable via a screwââ¬Â¦ fast & effortless. Anti-roll club has laser-engraved stripes (corresponding to club level) for simple recognition.