Ritchey Logic Comp 1-1/8" Threadless Headset: EC34/28.6 EC34/30, Black

Logic headsets feature smaller upper bearings to reduce weight. Oversize lower bearing to handle loads Deep cups for solid insertion Color: Black Crown Race: 30 S.H.I.S. Stem Clamp Diameter: 28.6 Threadless Bearing Type: Cup and Cone S.H.I.S Lower: EC34 S.H.I.S Upper: EC34 Defined Color: Black Lower Stack Height: 13.2 Weight: 108 Upper Stack Height: 15.7