That is a bit harder to find range, seems the kind found on higher end racers...that got ridden and worn out, as opposed to wider range Freewheels that came on more common bikes. I have a 12-23 6 speed Sante' I am trying to decide on which ride gets it...pretty good shape except for 3 chipped teeth...saw some HARD use by someone at some point...how do you break TEETH if you know what you are doing?!?