In theory you don't need a lock ring on the track as you'll never be resisting the drivetrain hard enough to undo the sprocket.
and if you have a mechanical like dropping your chain and getting it wedged on the seat tube, the sprocket will unscrew and you can coast to a stop, rather than getting forced into a skid or chucked off. Especially useful if it happens while you're riding in a group.
and if you have a mechanical like dropping your chain and getting it wedged on the seat tube, the sprocket will unscrew and you can coast to a stop, rather than getting forced into a skid or chucked off. Especially useful if it happens while you're riding in a group.