Rock Shox: THE FORK THAT DEFINES XC Ready from the start, the SID Ultimate Carbon comes equipped with all of the performance features elite athletes demand. From the gram-saving carbon crown-steerer to the friction-reducing DebonAir™ air spring and Maxima Plush fluid, the SID Ultimate Carbon provides the competitive advantage and lasting performance racers need.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, drastically reducing rider fatigueCarbon crown-steerer SPECIFICATIONSModel designator (SF): UltimateWheel size: 29 BTravel (mm): 100mmDamper Type: Charger 2 RLCFork offset: 51mm (29)Maxle included: Maxle StealthColor (FS): Gloss Blue, Gloss BlackE-MTB Decal: NoSteerer: Tapered CarbonAxle: BOOST™ 15x110mmAxle to Crown (mm): 506Brake type (FD): DiscCrown Material: 1 Piece carbon fiber crown-steererUpper 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 TokensSpring: DebonAirSpring rate: n/aMax Tire Diameter (mm): 755Max Tire Width (mm): 81Maximum Rotor Size: 220mmMinimum Rotor Size: 160mm