A absolutely top-of-the-line 1 1/8" threadless headset for the most discerning rider. It features oversized, sealed cartridge bearings, so packing and re-greasing bearings are a thing of the past. Specs: Fork type: 1 1/8" threadless Stack height: 28mm S.H.I.S. Upper: EC34 / 28.6 S.H.I.S. Lower: EC34 / 30 Crown Race: 30.0mm, split for easy install Weight: 112g