Ritchey replacement bearing for WCS headset upper cup, EC34/28.6 - ZS44/28.6, 1 1/8 inch, dimensions 41.0/30.15/7 mm, 45°/45°
The replacement bearing for the Ritchey WCS External Cup, EC34, and Zero Stack ZS44 headset topsets for frames with a 34 mm press-fit dimension at the bottom of the head tube and forks with a 1 1/8 inch / 28.6 mm steerer tube diameter at the top.
Herstellerinformation: RITCHEY, Via Angelo Maspoli 21, 6850 Mendrisio, Ticino, Switzerland, http://ritcheylogic.com | EU contact: Cosmic Sports, Leyher Strasse 47, 90763 Fürth, Germany, https://cosmicsports.de