With Flight Attendant, SID SL is the smartest, most efficient and personalized fork available. Increased bushing overlap, lower friction, and room for bigger tires, it is a lightweight fork built for the serious XC racer. DebonAir+ air spring Flight Attendant automatically adjusts suspension in real-time, optimizing every pedal stroke for efficiency and control while delivering unmatched personalization Fork-Only algorithm update enhances the Flight Attendant system to seamlessly adapt to hardtail bikes Charger Race Day 2 Flight Attendant electronic damper with Open/Pedal/ Lock positions 32mm chassis Pedal Sensor/Power Meter required (sold separately) SRAM Model ID: FS-SIDS-UFA-E1