Dropset 2 - Compatible with Open, 3T, All City, Low, Cinelli, Lynskey, and more. <p> <li>Engineered, manufactured and assembled in Portland, Oregon USA </li><li>King Lifetime Warranty </li><li>Legendary made-in-house bearings </li><li>Patented GripLock® retention design for dependable headset adjustment (US Patent 8662517) </li><li>42mm 45x45 upper bearing for 2.8-3.0mm bearing ream depth. </li><li>52mm 45x45 lower bearing </li><li>Compatible with our included baseplate and 45 degree integrated crown races</li></p>