Promax Intergrated Headset 45x45 Converts 1 1/8" frame steerer tube to a 1" fork Steerer Tube
IG-45 INTEGRATED HEADSET
Used by Marc Willers and World Champions Caroline Buchanan, the IG-45 integrated headset features an aluminum cap, bearing cover and crown race with super-smooth rolling, precision 45×45 bearings.