Backside anti-roll club for ball-bearing roll bar mounting system and redesigned to work well with the X4 back suspension arms. The anti-roll bar system is mounted towards the back bulkheads via bearings from outside for extra-smooth motion as well as for quick & effortless changes and adjustment. The roll club turns in ball-bearings for maximum accuracy and free motion. Anti-roll bar height is adjustable via a screwââ¬Â¦ quick & effortless. Anti-roll bar has laser-engraved stripes (corresponding to club thickness) for simple identification.