SHOKZ OpenFit AIR True Wireless Earbuds - Black YGroup_7033740034093 4mm (or 1-inch in old

4mm (or 1-inch in old speak) box-end wrench fits Park Tool Freewheel / Cassette Lockring Tools

so you can repair a damaged cage or even switch to the 1x cage easily

Function first

These are NOT compatible with the EP8 or EP800 series STePS e-bike platform

expandable

SHOKZ OpenFit AIR True Wireless Earbuds - Black YGroup_7033740034093 4mm (or 1-inch in oldShokz OpenFit Air earbuds redefine everyday audio with an open ear design that blends immersive sound and situational awareness. The open ear design with ergonomic Air Earhooks offers a secure, pressure free fit, and they are built with IP54 rated water and sweat resistance, making them suitable for workouts and outdoor activities. Features These earbuds connect using Bluetooth technology They're ideal for enjoying music and podcasts wherever you are