FSA Gravity 1 headset (1 1/8")

For through 1.5" head tube in conjunction with a tapered steerer tube (1.5"-1 1/8")

• upper bearing Cartdridge 36°/45°, lower bearing ball ring 7/23" x 20
• inner ø head tube 49.57mm
• outer ø head tube 55mm
• Aluminium bearing cups