A B767-200 PRIOR TO DEP WAS FOUND TO HAVE A B767-300 WHEEL AND TIRE ASSEMBLY INSTALLED IN #7 POS.

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I RECEIVED INFO THAT AN INCIDENT OCCURRED ON DEC/XA/99 CONCERNING THE WRONG TIRE BEING INSTALLED ON ACFT XYZ; #7 POS. THE ACFT WAS A DASH 200 SERIES; AND THE TIRE WAS A DASH 300 (PART #XXX) TIRE ASSEMBLY. THE INCORRECT TIRE WAS DISCOVERED BEFORE THE FLT THE NEXT DAY AND WAS CORRECTED IMMEDIATELY BEFORE FLT. I WAS CALLED IN FOR 4 HRS EARLY OVERTIME FOR THE TERMINAL. WHEN I RPTED TO THE TERMINAL; THEY TOLD ME TO GO BACK TO THE HANGAR. I RODE THE EMPLOYEE BUS BACK AND WAS THEN ASSIGNED TO SAID ACFT AT HANGAR. WHEN I ARRIVED; THE CHK AND THE TIRE CHANGE HAD COMMENCED. I WENT IN TO STORES FOR GLOVES AND CAME OUT TO HELP VXV ABC WITH CHANGING THE #7 TIRE. THERE MAY HAVE BEEN A THIRD PERSON; BUT SINCE IT WAS NOT UNCOMMON FOR THE 4 EARLY GUYS TO WORK THE B767; I DON'T RECALL EXACTLY. I SIGNED THE TIRE LOG AND FILLED OUT THE PAPERWORK AS NORMAL WHEN HELPING OUT. AND ALSO BACKED CHKED THE SAFETY AND TORQUE OF TIRE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE B767-300 TIRE HAS A SLIGHTLY GREATER DIAMETER AND A LARGER HEAT SHIELD. THE RPTR SAID THE IDENT OF THE WHEEL AND TIRE ASSEMBLY IS THE REAL PROB; AS THE TIRE IS NOT STENCILED WITH THE ACFT TYPE BUT MARKED ON THE WHEEL HALF INNER FLANGE AND DEPENDING ON WHEEL PLACEMENT IS NOT VISIBLE. THE RPTR SAID THE WX WAS EXTREMELY BAD WITH A COLD DRIVING RAIN AND LIMITED VISIBILITY.