To be honest Gio, it came to a collective decision in the end, as did most of the spec choice to be fair,
after speaking to a lot of people, no one could give me a definitve answer to a build spec sheet.
Ideally we needed Jim for this, but despite multiple attempts at trying to contact him, i am ashamed to say all my attempts failed.
So to enable the build to complete, a collective opinion on the spec was reached, from peoples memories, photos and pictures from magazines.
As with all PRO/AM racers, specs change quickly, it wears out, it breaks etc..., so we went with the information we have.
the build spec in the non disc wheel pics, are mainly Shimano deore XT, with mavic 231 rims, tioga finishing kit, flite saddle, ODI attack grips, onza bar ends etc, with the Panaracer Smoke and Dart tyre combination.
the disc wheel build, is all but the same, but using Specialized BX23 rims, with black Shimano Deore XT hubs, Grafton cranks with Tioga chainrings, to complement the Tioga finishing kit, and Grafton Brakes.
It was decided that "At best Guess" the tyres would have been either Panaracer Smoke and Dart, and/or Tioga Mud Dawgs....which are pictured mounted to the disc wheel option.
I still have a niggle in me that said, Specialized Ground controls were used, but others disagreed and left me the minority opinion, and with little else to go on, i ran with the general collective opinion.
The collective is what this forum is all about. Picking at peoples memories and knowledge. For what its worth I think you've done a spot on job with the spec mate, it couldn't be any better. At least the tyres are simple to change out if you ever do hear back from Jim.
Good luck for BOTM, not that you'll need it!