Rock Shox: THE FORK THAT DEFINES XC The SID Ultimate is packed with all of the ride characteristics and adjustability that elite XC riders demand - Lightweight, stiff, DebonAir™ air spring technology, Charger™ 2 RLC damper, and now includes Maxima Plush fluid. A complete race-bred performance driven package.THINGS TO REMEMBERNEW Maxima Plush damping fluid reduces friction and improves smoothnessNEW Signature SID Blue colorway and Ultimate High Gloss BlackNEW Ultimate Foil graphics packageCharger™ 2 RLC Damper featuring 2-position (open/lock) with compression adjustDebonAir™ air spring reduces friction from every single moving part, improving bump absorption and response under load, and drastically reducing rider fatigue SPECIFICATIONSModel designator (SF): UltimateWheel size: 29 BTravel (mm): 120mmDamper Type: Charger 2 RLCFork offset: 51mm (29)Maxle included: Maxle StealthColor (FS): Gloss Blue, Gloss BlackE-MTB Decal: NoSteerer: TaperedAxle: BOOST™ 15x110mmAxle to Crown (mm): 531Brake type (FD): DiscCrown Material: Forged, hollow aluminumUpper crown type: n/aLower leg material: MagnesiumUpper Tube Finish: Fast BlackUpper tube type: 32mm straight wall aluminumDamper adjust: CrownDamping adjustments: Extl rebnd, 2 pos (open/lock) w/ compression adjustVolume reducer: 0/3 TokensSpring: DebonAirSpring rate: n/aMax Tire Diameter (mm): 760Max Tire Width (mm): 81Maximum Rotor Size: 220mmMinimum Rotor Size: 160mm