RockShox RCT Damper Shaft Assembly

This assembly is specifically engineered for Deluxe Ultimate RCT B2-C2 models from 2023 and newer, as well as select Deluxe R (A1-B1) and Deluxe Select (B2) units. Always verify your shock's specific model year and version before purchasing, as internal components are rarely cross-compatible across different generations.

No, this is the damper shaft assembly itself. While it is a critical component for restoring performance, you will likely need a separate service kit containing the necessary O-rings, seals, and fluids to complete a full shock rebuild.

Installing a damper shaft requires specific suspension tools, precise torque settings, and a clean environment to prevent contamination. If you are not experienced with internal suspension service, we recommend having a certified technician perform the installation to ensure your shock functions safely and correctly.

Not necessarily. Air loss is typically caused by worn air sleeve seals rather than the damper shaft assembly. This component primarily addresses damping performance and responsiveness; if your shock is losing air, check your air spring seal kit first.

The 37.5-45mm stroke range indicates the physical travel limits this shaft is designed to handle. Using this part on a shock outside of this stroke range will result in improper suspension travel and potential damage to the internal components.