Bicycle Casette Spacers

Optimize rear wheel engagement and exact cog alignment with our Bicycle Cassette Spacers collection. Engineered to fill freehub body gaps when fitting 8, 9, 10, 11, or 12-speed cassettes, these spacers ensure the lockring tightens fully against the sprockets without binding or axial play. Choose from 1.85mm conversion spacers to run standard 10-speed cassettes on 11-speed HG freehub bodies, 1mm and 0.5mm micro-adjustment shims for perfect chainline tuning, or multi-piece single-speed conversion spacer kits. Precision-stamped and CNC-machined from lightweight aluminum and durable polymers, these spacers provide solid compression and smooth shifting across all gears.