3t Arx Ltd Carbon Stem: Superlight, Italian Formua-F1 design for maximized strength-to-weight. Full, carbon fiber with 4-bolt faceplate. Titanium hardware with scalloped, opposed bolt steerer clamp. Gloss carbon with with silver/white graphics.Latin for stronghold and bridge, ARX is our new design for the perfect connection between fork and handlebar. In particular, we have optimized the design of the clamps. Steerers and handlebars are now usually made of composite materials, and can easily be compromised by poor clamp design. To assure the integrity of the ARX clamp interface, we perform our own tests that go way beyond the demands of CEN standards. We even tested this new stems compatibility with other brands of handlebars and it passed with flying colors. ARX LTD is the carbon-fiber version of the stem, with Ti bolts. Super-light and super-stiff, it is a highly evolved, modern all-composite design weighing less than 120 g.