A formidable 35mm chassis with the Flight Attendant system, this fork is more efficient and advanced than ever. The Charger Race Day 2 Flight Attendant electronic damper features a three-position (3P) Compression adjuster— Open, Pedal, and Lock positions. Algorithm that uses a suite sensors to read rider and terrain inputs to anticipate the perfect suspension position. Fork-only mode for hardtail bikes and customizable Auto Mode to disable ''Pedal'' or ''Lock'' positions. Adaptive Ride Dynamics enables the Flight Attendant system to learn from the rider to make smarter, more personalized decisions for greater efficiency and even more speed. DebonAir+ provides more small-bump sensitivity and tunable mid-stroke support. SRAM Model ID: FS-SID-UFA-D2 Attributes Brake Type Disc Damping Flight Attendant Race Day Damping Adjustments External rebound, Electric control 3 position compression (open/pedal/lock) Crown Material Aluminum Rake 44mm Maximum Rotor Size 220mm Maximum Tire Width 66mm Spring Adjustments Air pressure, Bottomless tokens Spring Type DebonAir Steerer Tube 1-1/8''-1.5'' Steerer Tube Material Aluminum Lower Tubes Material Magnesium Stanchions Material Aluminum Travel 120mm Wheel Diameter 29'' Stanchions Diameter 35mm Axle/Hub spacing 15x110mm TA Remote Sold Separately e-Bike approved No