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The ORBEA TOPCAP STEM MTB OC ST-MP20 with bolt and star nut is a reliable finishing kit component designed to keep your MTB cockpit secure, precise and clean-looking. Mounted at the top of your steerer tube, the top cap works together with the included bolt and star nut to preload the headset bearings, helping to eliminate play and maintain smooth steering. This set is ideal when building a new bike, replacing worn parts, or upgrading from generic hardware to a high-quality, brand-matched Orbea solution.
Engineered for modern mountain bikes, this top cap assembly is compatible with standard threadless steerer tubes and typical MTB stems. The included star nut ensures a solid anchor inside the steerer, while the matching bolt allows accurate tensioning of the headset before the stem is fully tightened. Beyond function, the Orbea-branded top cap adds a subtle aesthetic upgrade to your cockpit, tying in neatly with other OC and Orbea components. Whether you are servicing your headset or refreshing your front end, this kit offers a simple, dependable way to restore crisp, confidence-inspiring steering.
