Originally Posted by
HillRider
FastJake is correct, a freewheel, single or multi-speed, does not require a lockring. A reverse threaded lockring is used on a fixed gear hub to prevent the cog from unthreading due to reverse pedal pressure but a freewheel doesn't need one. If your hub really has both a single speed freewheel AND a lockring, someone installed it unnecessarily and it may indeed be left-hand (reverse) threaded.
If someone installed a lockring unnecessarily on a singlespeed hub, I believe it will be normal (right-hand) thread. If the ring has several notches around its circumference, then it's a BB lockring that he doesn't need, and he CAN try tapping on the notches with a punch in a counter-clockwise direction. If he's seeing the disk with two dimples, that's not a lockring.