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. Box One Single-Speed Aluminum Cogs feature an alloy constructed from 7075-T6 aluminum, with a 5mm wide inner base for increased stability and strength. Anodized black for added protection, the cogs are detailed with laser-etched graphics for an eye-catching finish.
