RockShox: Every detail considered. Every ingredient premium. The new lighter-than-ever SID Ultimate is crafted around a rigid 35mm chassis and equipped with the lightest performance damper we've ever made. Ready to take you straight to the podium, SID Ultimate comes equipped with the new Race Day 2 3P damper featuring three compression positions: Open, Pedal and rock-solid Lockout.FEATURESNEW 35mm chassis is the perfect blend of light weight and rigidity for the modern XC bike. Plus, we made it lighter…again.NEW Charger™ Race Day 2 Damper — Every detail perfected, every extra ounce shaved away; this is our lightest performance driven damper ever. This 3P damper features three compression positions: Open, Pedal, or a rock-solid Lockout.NEW DebonAir+ provides more small-bump sensitivity and mid-stroke support.NEW Bushing Package maximizes the fork’s bushing overlap, reducing friction and creates the smoothest ride possible.NEW crown machined to perfection for lighter weight and greater strength.NEW Blue Crush signature colorway and Ultimate High Gloss Black featuring new lusty Pearl White graphics package.NEW bolt-in torque cap adapters included for use with standard hub end caps.Maxima Plush damping fluid reduces friction and silences damper noise.SID D1 remote lockout forks require purchase of corresponding remote: 2 position – R8079000, 3 position – R8079001 SPECIFICATIONSModel designator (SF): UltimateWheel size: 29Travel (mm): 120mmDamper Type: Charger Race DayFork offset: 44mm (29)Maxle included: Maxle StealthColor (FS): Gloss Black, SID Blue Crush - GlossE-Bike Approved: E-bike ApprovedSteerer: 1.5 TaperedAxle: 15x110mm BOOST™Axle to Crown (mm): 531Brake type (FD): DiscCrown Material: Forged, hollow aluminumUpper crown type: n/aLower leg type: MagnesiumUpper Tube Finish: Fast BlackUpper tube type: 35mm tapered wall aluminumDamper adjust: CrownDamping adjustments: Extl rebnd, 3 pos comp (open/pedal/lock)Volume reducer: 0/3 TokensSpring: DebonAirSpring rate: n/aMax Tire Diameter (mm): 758Max Tire Width (mm): 66Maximum Rotor Size: 220mmMinimum Rotor Size: 180mmFender Compatibility: n/aCrown OD (mm): 58