APPROX 25MIN AFT LNDG,FLT 168 WAS CLEARED FOR TKOF ON RWY 30 AT DULLES INTL ARPT. ABT 1MIN LATER THE CREW CALLED FOR AN ABORTED TKOF BECAUSE THE #2 EPR APPEARED SLOW TO SPOOL UP. AFT TAXIING BACK AND RUNNING UP THE ENGINES, FLT 168 ATMPTD A SECOND TKOF. DFDR READOUTS INDICATE THE ACFT GOT UP TO 103KTS BFR THE CAPT ABORTED THE TKOF. THEY ALSO INDICATE LESS THAN NORMAL BRAKING DURING THE PROCEEDING LNDG AND FIRST ABTD TKOF. DRNG THE TAXI BACK TO THE GATE, AT WHICH THE CREW WAS GOING TO HAVE THE EPR GAUGE FIXED, THE PLT NOTICED THE ACFT START TO DRAG TO THE RIGHT. THE ACFT WAS STOPPED AND TRANSMITTED TO THE TOWER THAT THEY NEEDED A MOBILE LOUNGE SENT OUT TO TAXIWAY N1 TO OFFLOAD THEIR PAXS. ABT 40 MINS LATER THE LOUNGE ARRIVED AND NOTICED A FIRE DEVELOPING IN THE RT MAIN WHEEL AREA. THE ACFT WAS EVACUATED USING BOTH CHUTES ON THE LEFT SIDE AND THE FIRE WAS EXTINGUISHED IMMEDIATELY UPON ARRIVAL OF THE ARPT FIRE TRUCKS.