Riding the SID Ultimate means that every detail is taken into account. The new Charger Race Day damper, housed in an entirely new chassis, is the lightest RockShox to date. Perfectly balanced for the speed requirements of XC. The new 35 mm chassis is the ideal blend of low weight and stiffness for modern XC bikes. The new Charger Race Day damper is the lightest production damper with rock-solid locking. The new DebonAir air spring is specifically tuned to meet the demands of XC and maintains a higher ride height to enhance confidence and control. New SKF wiper seals with extremely low friction provide long-lasting fork performance and improve the overall suspension feel. Maxima Plush damping fluid reduces friction and dampens noise. Two-bolt mounts for attaching a short fender. Min./Max. rotor size: 180/220 mm. Fork offset: 44 mm - Includes fender, star nut, Maxle Stealth thru-axle, TwistLoc remote.