Setting headset preload on a modern Pinarello means working with the fully internal cockpit, and this two-piece system from MOST handles both jobs that job requires. The Pinarello Headset Top Cap Adapter and Expander pairs the structural fork expander plug with the outer aerodynamic top cap, so you get the compression wedge that adjusts bearing preload and the cover that keeps the front end looking clean. MOST is Pinarello's in-house component brand, so this is the factory part rather than a universal aftermarket substitute.

The expander plug seats inside the steerer and acts as the anchor point for the top cap bolt, letting you dial in headset bearing preload the same way a traditional star nut and cap would, but without cutting or compressing a star nut into a carbon steerer. The outer top cap carries a unidirectional carbon finish in black and follows the aerodynamic profile of the cockpit, so it sits flush with the routing rather than breaking up the lines with a round aftermarket cap.

This is built specifically around the 1-1/8" (28.6mm) steerer and the Pinarello Aero and TiCR integrated handlebar and stem systems. If your bike runs internal routing through the cockpit and headset, this is the correct part to keep that system sealed and functioning. It is not a fit for round-steerer setups or standard external routing, so confirm your frame uses the integrated MOST cockpit before ordering.... Read More