lockring

you must use a lockring wrench to remove the cog.

always check if the lockring is tight before riding.

the mechanic installed a new lockring on the hub.

a loose lockring can cause the cassette to wobble.

please tighten the lockring to the proper torque specification.

thread the lockring carefully to avoid cross-threading.

we need to replace the stripped lockring immediately.

fixed gear bikes require a front chainring lockring.

inspect the lockring threads for signs of wear or damage.

apply a thin layer of grease to the lockring before installation.

the lockring secures the cassette sprockets onto the freehub body.