RockShox ZEB Flight Attendant B1ZEB is built for the most extreme terrainsteep double black runs, freeride features, and even the pedal back up if thats in the cards. And with Flight Attendant on board, ZEB Ultimate is unrivaledits improved algorithm personalizes every adjustment to your preferences, terrain, and effort, so you can charge without hesitation. LinearXL air spring delivers a consistent and predictable ride feel backed by Adjustable Bottom Out (ABO) for end stroke