SoloAir spring system (positive/negative) with external Schrader valve and internally adjustable via All-Travel spacer to change travel by 20mm (stock travel listed first) Coil spring system with preload adjustability MotionControl oil damping with external rebound and compression+lockout with internal floodgate adjustment (right hand PopLoc handlebar remote kit included with RS-9300/9303) Threadless aluminum steerer with 32mm 6069 aluminum stanchions fixed into a forged 6061-T6 aluminum crown 1-piece magnesium lower legs with Power Bulge lower bushing reinforcement and 9x100mm quick-release dropouts, disc brake only (74mm Post-Mount): max 210mm rotor / 2.3" tire