FREEWHEEL:
Zeus 2000 Super Earlumin II - 13/19 (13-14-15-16-17-19) standard 6 speed - 22 mm splined removal interface - 1.370" x 24 TPI English thread - 2x4 non-stepped cylindrical steel body - hardened Clear anodized Super Earlumin II alloy cogset / eight notch slip fit polyvalent cogs / duplex threaded locking cog pair (inner crafted from hardened Clear anodized Super Earlumin II alloy / outer crafted from heat treated steel - model Super Earlumin II 29100.06 ... [The original 2000 Series alloy freewheel was one of the very first components to see production as part of what ultimately became an entire 2000 Series groupset which Zeus brought to market in piecemeal fashion over the course of almost three years from 1972 to 1975. The six speed version of their freewheel seen here has the same body as its five speed counterpart, the extra cog being comprised of a duplexed pairing of outer cogs which serve as a threaded lock to retain the remaining four slip fit units as opposed to a singleton threaded outer cog serving that same purpose. Lightweight, easy to maintain, exceedingly functional, and remarkably durable (...so long as you did not use them in conjunction with a Regina chain which would otherwise chew those alloy cogs up in short order due to peculiarities of its design), in my own humble opinion, the Zeus 2000 freewheel was absolutely the best and perhaps most intelligently designed threaded freewheel produced prior to introduction of the Campagnolo Record unit in 1983 (...even then, I view the relative aggregated merits of those two competition oriented freewheels as almost a toss-up given that the Campy Record incorporated many features pioneered by the Zeus 2000). The original freewheel provided on a Graftek G-1 sold new as a "complete" bike would have typically been a Regina Super Corsa "Oro" model five speed.]
