44mm Head Tube in Reynolds 631 150mm long
OD = 48mm stepped down to 46.5mm
ID = 43.8mm for a distance of 16mm both ends stepped out to 44.1mm
44mm Head Tube in Reynolds 631 150mm long
OD = 48mm stepped down to 46.5mm
ID = 43.8mm for a distance of 16mm both ends stepped out to 44.1mm