The Campagnolo Ergopower EC-RE209 Index Spring Right 9-Speed is a replacement internal component designed specifically for right-side 9-speed Ergopower shift levers. As part of the intricate mechanism that governs indexed shifting, this small but essential spring helps ensure precise, reliable engagement of the ratchet and pawl system that controls rear derailleur movement. When the original spring has fatigued or failed due to wear, contamination, or age, the EC-RE209 restores crisp shift feel and smooth performance without requiring a complete lever replacement.

Functioning within the right-hand Ergopower assembly, the index spring plays a key role in maintaining consistent tension and return action for the shifting mechanism. Indexed systems rely on finely tuned spring forces to advance the cable in discrete steps with each click, and any degradation in spring performance can lead to missed shifts, excess lever play, or incomplete gear changes. Installing a fresh index spring helps bring the shift lever back to its intended engagement characteristics, supporting precise rear derailleur indexing across all 9 speeds.

Campagnolo crafted this spring from durable, fatigue-resistant steel designed to withstand repeated flexing over many cycles of use. Its compact form and specific geometry match the original design specifications, ensuring compatibility and proper function within the Ergopower right-hand assembly. Like other internal parts of high-end shift levers, reliability and dimensional accuracy are critical, and the EC-RE209 meets those standards by providing a consistent return force that supports crisp click-feel and dependable performance.

Replacement of the index spring is generally performed during lever service or overhaul, often alongside other maintenance such as cleaning, lubrication, and inspection of pawls, ratchets, and bearings. When installed correctly, the spring integrates seamlessly into the Ergopower internals, restoring the lever’s shift precision and helping maintain the intended tactile feedback. For riders who value a well-tuned drivetrain and consistent shifting under load, keeping this spring in good condition is an important part of ongoing maintenance.

Because it is a small internal component, the Ergopower EC-RE209 is lightweight and unobtrusive once installed, yet it has a noticeable impact on the overall shift feel and performance. It’s suitable for anyone working to rebuild or refresh 9-speed Campagnolo Ergopower levers to their original standards, offering a straightforward and cost-effective way to address internal wear without resorting to full assemblies.