OneUp Components

V2.1 Dropper Post Rebuild Kit

The OneUp Components V2.1 Dropper Post Rebuild Kit is the correct service kit for bringing a OneUp V2 dropper post back to smooth, tight-running performance. The V2.1 update centers on an improved midcap assembly that reduces friction and helps restore consistent return speed, making it a smart fix when a post feels sticky, slow, or develops play over time.

• V2.1 improved midcap assembly - Updated design with ultra-low friction SKF seals to reduce stiction for smoother actuation
• Upper and lower bushings - Replaces common wear points to help tighten up feel and maintain proper alignment
• Anti-rotation pins - Restores positive saddle alignment and correct post indexing
• Complete rebuild coverage for V2 posts - Includes the key internal wear parts needed for a proper V2 dropper post service
• Slow top-out troubleshooting note - Before rebuilding, verify air pressure with the post fully extended: 280–300 psi. The valve is located under the top clamp.
• Diagnosing an upper bushing issue - If top-out remains slow after confirming air pressure, an upper (white) bushing may be due; a telltale sign is the original bushing becoming difficult to reinstall once removed.