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 TurnKey oil damping with external rebound adjustment and compression lockout (right hand PopLoc handlebar remote kit included with RS-9305) Threadless aluminum steerer with 32mm 4130 CrMo taperwall 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, rim brake compatible on RS-9306/9307 plus disc brake (74mm Post-Mount): max 210mm rotor / 2.3" tire