MD80 CREW LEARNS INFLT THAT THEY HAD A TIRE FAILURE ON DEP. THEY MAKE AN EMER LNDG AT DEST WITH AN UNSAFE GEAR INDICATION.

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ADVISED BY CTR THAT COMPANY ACFT WANTED TO TALK TO US ON DISCRETE FREQ. IN COMS WITH OTHER ACFT; FOUND OUT THEY DEPARTED AFTER US. THEY SAW ON TKOF ROLL WHAT APPEARED TO BE RUBBER DEBRIS ON RWY. THE CREW WAS ALERTING US TO THE FACT THAT THIS MAY HAVE BEEN FROM OUR ACFT. I CALLED TO ASK FLT ATTENDANTS IF THEY SENSED ANYTHING UNUSUAL WITH OUR ACFT AT ANY POINT IN TIME. THEY ADVISED THAT 2 PAX THOUGHT THEY HEARD SOMETHING UNUSUAL WITH ONE RPTING A SHORT AND BRIEF SMELL OF BURNT RUBBER. 1 INDIVIDUAL (SEATED IN ROW 6; A COMPANY AVIONICS TECHNICIAN) FELT THE NOSE GEAR AREA WAS SUSPECT AND THE OTHER (A MALE PAX SEATED IN ROW 22D) FELT IT CAME FROM THE AREA AROUND THE R MAIN GEAR. LOOKED AT GEAR CONDITION; UP AND LOCKED WITH NO LIGHTS ILLUMINATED. HYDS AND OTHER ACFT SYS OK. BASED ON A VARIETY OF INFO FROM DIFFERENT SOURCES; CONTACTED DISPATCH TO ADVISE THEM OF POTENTIAL PROB WITH LNDG GEAR AND WHEEL ASSEMBLY. THEY WERE TO ADVISE BOTH TECHNICIAN AND STATION PERSONNEL. ADVISED ATC OF SITUATION; DECLARED AN EMER; AND ASKED THEM TO PASS ALONG INFO TO DEST ARPT. SPECIFICALLY REQUESTED CFR UPON ARR. ADVISED PAX 20 MINS OUT OF SITUATION. EXTENDED GEAR NORMALLY AND GEAR INDICATED L MAIN GREEN; NOSE GEAR GREEN; AND R MAIN RED. RAN UNSAFE GEAR CHKLIST. RAN EMER/ALTERNATE GEAR EXTENSION WITH SAME GEAR LIGHT INDICATIONS. FLEW BY DEST TWR FOR OBSERVATION. TWR ADVISED THAT NOSE GEAR MAY APPEAR TO HAVE PROBS AND R MAIN GEAR APPEARED TO BE EXTENDED AND DOWN. CFR WAS ADVISED OF CONDITION OF OUR ACFT. UPDATED PAX AS TO CONDITION OF ACFT AND HAD FLT ATTENDANTS BRIEF PAX ON THE BRACE PROCS. COMMUNICATED WITH ALL FLT ATTENDANTS TO REVIEW POSSIBLE ACFT AND EVAC SCENARIOS AFTER LNDG. LNDG WAS NORMAL AND LONG. STOPPED ACFT AND COMMUNICATED WITH CFR. THEY RPTED NO FLUIDS LEAKING; NO SMOKE; NO FIRE. ADVISED FLT ATTENDANT #1 OF ACFT CONDITION. CFR ADVISED OF R MAIN INBOARD TIRE TREAD SEPARATION AND DAMAGE TO FLAP AREA AFT OF R MAIN INBOARD TIRE. CALLED TECHNICIAN FOR THEIR IDEAS ON REPOSITIONING ACFT. BASED ON DAMAGE INFO THEY WANTED GEAR PINNED; HYD PRESSURE OFF; AND ACFT TOWED TO GATE. CALLED DISPATCH WITH UPDATE OF SITUATION. POSTFLT INSPECTION REVEALED TREAD SEPARATION DAMAGED MICRO SWITCH FOR R MAIN GEAR POS INDICATION.