X 1900 SPLINE® Discover the world of cross-country with a reliable wheel that lets you focus on the moments that matter. Discover the world of cross-country with the X 1900 SPLINE. The 25 mm aluminium rim gives modern tyres the support they need to run at a lower pressure, reducing rolling resistance. The new Ratchet LN freehub system, combined with meticulous hand-built construction, ensures maximum reliability. This lets riders concentrate on what counts, whether that means making their rivals sweat or beating their KOM or QOM personal bests.