This link below should be a sticky the number of times it answers questions:
http://www.mombat.org/Timeline.htm#1991
# Tires: Ritchey Force, Ritchey Duro, Ritchey Mega Bite Hard Drive/Over Drive/ Z-Max, Ritchey Quad, Specialized Ground Control/Extreme, Tioga Farmer John/Cousin/Nephew, Panaracer Smoke, Michelin Hi-Lite Hot, Tioga Trail Dawg/Mud Dawg/Wonder Dawg/Hound Dawg, Panaracer Khartoum
# Rims: Araya RM 14/17/20, Matrix Aero/Singletrack Comp, Mavic Oxygen M6 (silver, black, hard anno), Mavic PSP 231/261, Mavic MA2/MA40 (rolled down road rims), Ritchey Vantage/Comp/Expert/Sport, Uni Disk (nylon cover), Sugino and Tioga Tension Disk, Specialized GX23, Weinmann Bontrager-1, Sun Chinook, Campagnolo Kappa/Thor/Contax