Problem Solvers Locking Headset Spacer, 8mm BLK

Problem Solvers Locking Headset spacers help maintain headset adjustment when removing or replacing stems and have a compact, lightweight, and unobtrusive design. 8mm stack height, 34.5mm OD to match diameter of most aluminum stack spacers CNC-machined AL-6061-T6; compact, lightweight, unobtrusive design Maintain headset adjustment when removing or replacing stems Simplify bicycle disassembly and reassembly for shipping purposes; useful for displaying framesets in shop 4mm stainless steel bolt; requires 3mm hex key for installation Thickness: 8 mm Color: Black S.H.I.S. Stem Clamp Diameter: 28.6 Defined Color: Black