Box One Single-Speed Aluminum Cogs are 7075-T6 aluminum alloy. It’s designed to fit Shimano compatible cassette hubs and has a 5mm wide inner base, giving a more solid interface with the cassette body. The alloy cogs are anodized black with laser-etched graphics.

Material: 7075-T6 Aluminum

Process: CNC-Machined

Finish: Two-Toned & Solid Anodized w/Laser-Etched Graphics

Size: 13T, 14T, 15T, 16T, 17T, 18T

Compatibility:
Driver: Dhimano HG Freehub Body
Chain: 3/32 or

Weight
13T: 8 g / 0.30 oz
14T: 11 g / 0.40 oz
15T: 13 g / 0.50 oz
16T: 14 g / 0.80 oz
17T: 16 g / 0.60 oz
18T: 18 g / 0.65 oz