Rock Shox Monarch RL C2 Rear Bicycle Suspension Shock Intended Use: XC, Trail Fast Black hard anodized, forged aluminum body with sag gradients 9mm 7075 aluminum shaft RL shocks feature external rebound and 2-Position compression adjustment (Open, Pedal), Solo Air lets you add air to your shock through a single Schrader valve, filling both the positive and Rapid Recovery allows the shock to recovery faster between consecutive bumps, letting the wheel track the ground with greater precision