Box Three Steel Press-In Threadless Headset

Box Three Steel Press-In Threadless Headset features a 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, sealed, cartridge bearings and are designed for frames that accommodate external cup style headsets.

• Material 6061-T6 Aluminum (cap), Steel (cups)
• SHIS EC34/28.6 | EC34/30
• Weight 165 grams / 5.8 ounces