The standard upper head tube cone that has always shipped with The Creator Frame Fixture has had an outside diameter of 46.5mm. Lately some builders are using 52mm and larger upper headsets for various applications like internal routing and some e-bike builds. This ought to do it! 303 stainless steel M16 x 2.0 thread 8.3mm thru hole Cone diameters 28-60mm 60º included angle
