I don't think they used the word Cyclex back when Air was made. I remember when they started calling SL/SLX Cyclex, in the sense that I remember it happening, but not what year that happened. ('87-'88 maybe?) Well after Air came out anyway. Cyclex is just Cr-Mo though, I believe with some claims of extra refinement compared to generic Cr-Mo. Finer dispersion of carbides, added strength from work-hardening or some such? It's probably only slightly better (if at all) than generic "aircraft" Cr-Mo. Nivacrom, and later Thermacrom, were substantially different and stronger, but Cyclex = Cr-Mo.