Box Three Threadless Headset
Box Three™ Threadless Headsets feature a hybrid aluminum and steel construction. The top cap, upper bearing cover and lower race are CNC-machined from high strength 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, cartridge bearings and is designed for frames that accommodate external cup style headsets.
|1 Inch||1 1/8 Inch|
|Material||6061-T6 Aluminum, Steel||6061-T6 Aluminum, Steel|
|SHIS||EC 30 / 25.4 | EC 30 / 26||EC 34 / 28.6 | EC 34 / 30|
|Weight||155 grams / 5.5 ounces||163 grams / 5.7 ounces|