The ACS Maindrive headset features hybrid aluminum and steel construction. The top cap, upper bearing cover and lower race are CNC-machined from aluminum alloy while the cups are made from steel. This construction results in a high-quality headset at a lower cost. Each headset is fitted with smooth rolling bearings and includes a star nut and matching aluminum top cap.
This headset will fit mini & junior-size frames that have head tubes with a 30.2mm inner diameter and forks with a 26.4mm crown race. It will NOT fit old school 32.7mm BMX bikes.
Size: 1" threadless
Color: Black
