RockShox Lyrik Ult Flight Attndt Fork 29" 15x110 160mm BlackLyrik harmonizes descending power with effortless efficiency. And it does it all with help from Flight Attendant. Flight Attendant algorithm uses a suite sensors to read rider and terrain inputs to anticipate the perfect suspension position. Charger 3. 1 Flight Attendant electronic automatic damper ButterCups block 20% of high frequency trail chatter. Limiting these vibrations reduces hand and arm fatigue leaving you feeling fresh with more control.