Originally Posted by
DiabloScott
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Looks like a Graftek, although I'm not aware they contracted...
I think that the look of these frames (besides their black tubes) stems from the longer lug sockets needed to effect a reliable bond between carbon and metal.
But the Graftek didn't use aluminum alloy lugs, so the lugs looked much slimmer.
Specialized had Giant make "annular" lugs (for the Epic) that overlapped and bonded to both the inside
and outside diameters of the tubes, which allowed much-shorter lug sockets.
And Specialized used full-length seatstays in lieu of a mono-stay, helping their bikes look more normal (like a contemporary steel bike with oversized tubing).
The original fork on the Ironman Carbon would have been simple bonded aluminum, like a Vitus, Epic or SR Prism fork.
WSI (Centurion) seems to have kept their supplier a tight secret all of these years.