Discover the ultimate in steering tube security and headset performance with our premium Cinelli Expander Kits, designed exclusively for 1-1/8″ (28.6mm) carbon steerers on Columbus forks. Crafted from high-quality, durable materials, these kits feature dual knurled aluminum expander wedge-rings that provide a secure fit and precise compression tension for a smooth, reliable ride. The aluminum stem cap and bolt ensure easy installation and long-lasting performance, making them ideal for both professional and recreational cycling enthusiasts. Engineered for optimal performance, these expander kits are compatible with threaded and threadless carbon steerers, offering versatility across a wide range of bicycle setups. The sleek black and silver design complements any frame aesthetic while ensuring lightweight performanceeach kit weighs only 49 grams with the stem capso you can maintain a responsive, efficiency-focused ride. Whether upgrading your existing fork or building a new bike, the Cinelli Expander Kit provides a secure, high-performance solution for maintaining proper headset preload and ensuring steering precision. Designed with innovative engineering features including dual knurled rings for enhanced grip and ease of adjustment, these expander kits combine style, durability, and functionality. Perfect for road racing, mountain biking, or gravel riding, they are a must-have component for cyclists seeking reliability and peace of mind during every ride.