RockShox SID SL Ulti Flight Attdnt Race Day 29" 110mm RedFeatures Flight Attendant, uses an algorithm with a suite of sensors to read rider and terrain inputs to anticipate the perfect suspension position Lightest XC fork available, 32mm chassis focused on light weight for the classic XC bike Charger Race Day 2 Flight Attendant electronic damper with Open Pedal Lock positions Can be used in conjunction with SIDLuxe Ultimate Flight Attendant rear shock or as fork only for hardtail application Requires SRAM