B737-300 INITIATED HIGH SPEED ABORT AFTER ENCOUNTERING AIRSPEED LOSS/WINDSHEAR ON TKOF ROLL.

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WE HAD DELAYED TKOF FOR WINDSHEAR CONSIDERATION. NO RPTED WINDSHEAR AT TIME OF TKOF ROLL. FO MADE ONE CALL OF AIRSPD HANG UP. I NOTED THE SPD TAPE AND IT WAS NOT NEGATIVE. AT 140 KTS; THE FO CALLED HANG UP ONCE AGAIN. I NOTED THE AIRSPD TAPE AT A MINIMUM 10 KT NEGATIVE TREND. AT THE SAME TIME; I WAS APPLYING FULL OR NEARLY FULL R RUDDER. I THEN ABORTED THE TKOF. WE DID CLR THE RWY. WE ASKED FOR ASSISTANCE IN THE FORM OF FIRE TRUCKS WHEN THE ABORT WAS FIRST RPTED TO TWR. THEY DIDN'T HEAR US AND SENT US OVER TO GND. FIRE TRUCKS WERE ASKED FOR THREE TIMES. AT ONE TIME I ASKED GND IF THEY COULD SEE ANY SMOKE COMING FROM OUR MAINS. I DON'T THINK I EVER RECEIVED AN ANSWER. WE COULDN'T GET IT CONVEYED TO ATC THAT WE WERE NOT GOING TO TAXI ANY FURTHER AND WE NEEDED FIRE ASSISTANCE. SUPPLEMENTAL INFO FROM ACN 743089: FIRE RESCUE ARRIVED AND WERE GREAT IN COMMUNICATING WITH US. THEY CHOCKED THE NOSEWHEEL RIGHT AWAY AND GAVE US INFO ON THE CONDITION OF THE ACFT. ONE R MAIN MOUNT TIRE SEEMED TO BE LOW AND THERE WAS SOME DEBRIS UNDER THE TIRE. AFTER OUR COMS WITH TWR DURING/AFTER THE ABORT; I FELT AS IF ATC DID NOT UNDERSTAND THAT WE NEEDED TO STAY PUT AND HAD REQUESTED FIREFIGHTING ASSISTANCE. THE FLT ATTENDANTS WERE GREAT AT KEEPING EVERYONE IN THE SEATS AND ASSISTING THE CUSTOMERS WHILE WE COORDINATED THE TRANSPORTATION.