Specification:
◎ IS42/28.6∣IS42/30
◎ Threadless Headset
◎ Alloy, Sealed Bearings
◎ ACB 45° x 45°
◎ TOP NUT: 1 1/8"
◎ CUP O.D.: 41.8
◎ CROWN CONE: 30
◎ Height: 16.4mm
◎ Options: steel crown race (RB1) & plastic top cap (RB2)
Integrated Threadless Headset RB