If you hadn't noticed, IRD Classica freewheels (the more successful successor to the highly problematic Defiant freewheels) gradually vanished from the market over the last year. I have a couple of the Classicas and they have held up over many thousands of miles in varied weather (unlike a failed Defiant) so was disappointed that my supply disappeared. Well, I just checked and IRD is now selling the "Cyclone Mark 1" freewheel which looks just like the Classica. It's available in a wide range of cog sizes encompassing 5-, 6-, and 7-speed clusters.
Cyclone Mark 1 Freewheels 5/6/7-Speed ? Interloc Racing Design / IRD
IRD gear chart
