Ritchey Lower headset with semi-integrated cartridge

The CroMo Ritchey Comp Cartridge Semi-Integrated ZS Lower Headset features sealed, titanium-coated, stainless steel angular contact cartridge bearings packed with high-lubricity Ritchey grease.

Material: alloy

Headset height: 2.8mm

Head tube OD/ID: 50/44, 55/49, 61/55, 62/56mm

S.H.I.S.: ZS42/30 (1 ⅛"), ZS49/33 (1 ¼"), ZS55/40 (1.5"), ZS56/40 (1.5")

ZS42/30 (1⅛") bearing: 41/30.15/7mm 45°/45° - sealed cartridge (ACB)

ZS49/33 (1 ¼") bearing: 46/34.1/7mm 45°/45° - sealed cartridge (ACB)

ZS55/40 (1.5") bearing: 51.9/40/8mm 45°/45° - sealed cartridge (ACB)

ZS56/40 (1.5") bearing : 51.9/40/8mm 45°/45° - sealed cartridge (ACB)

Weight: 40g

Color: black