Enduro HDK-0007 External Bearing Kit - EC34/28.6 Upper | EC34/30 Lower Angular Contact Bearings Straight BLK OxideThis unique bearing kit eliminates the external headset bearing cup and provides a simple low profile solution where the bearing itself presses directly into the head tube. The kit includes fork crown race upper split ring and cap. S. H. I. S Upper EC34 S. H. I. S. Stem Clamp Diameter 28. 6 Threadless S. H. I. S Lower EC34 Color Black Crown Race 30 Bearing Type ACB Defined Color Black