Headset Washer - Sonic Alien | 02.112.00028

Compatible with Dualtron Sonic Alien, this bearing washer is a steering component fitted above the headset bearing within the stem assembly. It is a precision metal washer designed to sit directly on top of the headset bearing, providing a smooth load surface for the headset nuts. The washer connects the bearing to the upper hinge and swing arm assembly, allowing correct preload while maintaining smooth steering rotation. Installed during stem headset assembly, it helps distribute clamping force evenly and prevents bearing damage or binding during steering movement.