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The Zipp 11.6618.029.004 is a genuine Zipp conversion cap set designed to adapt your Zipp hub to a specific axle or dropout standard. Built to the same high standards as Zipp’s premium wheels, these caps ensure a precise fit, smooth interface with your frame or fork, and long-term reliability. Using the correct conversion caps is essential for maintaining proper bearing preload, alignment, and stiffness, especially on high-performance road and gravel bikes where every watt and every millimeter of tracking accuracy matters.
Ideal for riders upgrading frames, forks, or axle standards, these Zipp conversion caps let you keep using your favorite Zipp wheels instead of replacing an entire wheelset. Installation is typically straightforward and tool-light, making it a practical solution for home mechanics and professional workshops alike. Because they are engineered specifically for Zipp hubs, you can trust the tolerances, finish, and durability. Whether you are modernizing an older wheel or fine-tuning a current setup, the Zipp 11.6618.029.004 conversion caps provide a clean, secure, and performance-focused fit.
