Performance matters at every level, even your headset, and with the BOX One Carbon Headset each unit features a custom CNC-machined aluminium compression cap in the shape of the Box logo with cut-outs to reduce weight. Every gram counts! Which is why the top bearing cover is crafted from delicious carbon fibre. At the centre of the top cap is an anodized aluminium bolt that threads into a gold anodized aluminium expander plug. This expander eliminates the need for a star nut and works with all 1-1/8-inch steerer tubes—even carbon fiber steerer tubes. So this headset is versatile, as well as good looking. Speaking of versatile, although Box 1.5-inch headsets are intended for tapered frames and forks and include, an adapter crown race that allows you to run a fork with a straight 1-1/8-inch steerer tube.

At the heart of the headset are two super-smooth, titanium-nitride coated, sealed, 45×45 bearings. The titanium coating results in a low friction coefficient, increased corrosion resistance, and smoother rolling bearings and a split crown race makes installation and removal from forks super easy.