Extruded and CNC-machined from 6061-T6 aluminum, BOX Hub Spacers feature a minimalist design that is super lightweight and extremely good looking. Weights range from 0.2 to 0.8 grams, depending on the size.
Sold in packs of four, including two 1-millimeter and one each 3- and 5-millimeter widths, a set provides spacing adjustments from 1 to 10 millimeters.
Available in Anodized Red, Blue, Gold and Black to fit Shimano-compatible cassette bodies. MSRP: $14, 5 grams/0.17 ounces per set.