RockShox Charger RLC Damper Upgrade Kit – Crown 100mm Max Travel fits SID RLC (A1) SID RL/XX/WC (B1) SID B4. Increase the performance of Rockshox forks with a Charger upgrade kit. Features include a no compromise lockout where the “Pedal” and “Lock” circuits sit behind the damping meaning no sacrifice in downhill bump control while maintaining pedaling stability on climbs. The extruded bladder design is durable resists damping change during extended downhills and has virtually zero pressure offset for small bump sensitivity. Available damper settings: Open with an adjustable low speed compression Pedal and Lock.