There are three types of headset in the Record? groupset: Threadless?, Hiddenset? and the traditional threaded headset. The Threadless? headset has been designed for unthreaded fork steerers. It is extremely light and allows fast sensitive adjustment. It is distinguished by its weight and working life. The Hiddenset? headset is integrated into the head tube of the frame, conferring an extremely elegant look to the bicycle. Light, smooth, long lasting and easy to install, the Record headset is available in the standard version or with a TTC? cap. internal headset for unthreaded fork tube - version 1-1/8": height 5.9 mm, version 1-1/8" TTC?: height 15.9 mm - patent pending system - composite and light alloy fixing screw and cap. BC 1"x24tpi - height 36.5mm - grease-port for fast lubrication.