The RockShox SID Ultimate FA 29" Fork features Adaptive Ride Dynamics that enables the Flight Attendant system to learn from the rider and make smarter, more personalized decisions for greater efficiency and speed. The fork is equipped with a Charger Race Day 2 Flight Attendant electronic damper that features an automatic three-position compression adjustment with Open, Pedal, and Lock positions, along with independent adjustable rebound. The 35mm chassis provides the perfect blend of lightweight construction and rigidity for modern XC bikes. DebonAir+ air spring technology delivers more small-bump sensitivity and tunable mid-stroke support. The fork accommodates 160mm minimum to 200mm maximum rotor sizes and supports a maximum tire width of 66mm.