FLC OF LR60 HAS HIGH SPD; HIGH GROSS WT REJECTED TKOF. THEY AVOID RUNNING THROUGH THE END RWY LIGHTS BY EXITING THE L SIDE OF THE RWY.

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DURING TKOF FROM RWY 1L AT IAD I WAS INVOLVED IN A HIGH SPD HIGH GROSS WT REJECTED TKOF DUE TO A CATASTROPHIC FAILURE OF BOTH R MAIN TIRES. THE APPROX SPD OF THE ACFT AT THE TIME OF THE ABORT WAS 120 KTS. THE CALCULATED V1 SPD FOR THE CONDITIONS WAS 131 KTS. THE TIRE FAILURE SUBSEQUENTLY RESULTED IN THE DISINTEGRATION OF THE ENTIRE R BRAKE ASSEMBLY WHICH IN TURN SEVERED THE HYD LINES AND ELECTRICAL CONNECTIONS TO THE ANTI SKID AND SQUAT SWITCH SYS. BECAUSE OF THIS THE THRUST REVERSERS WERE INOP. DIRECTIONAL CTL WAS MAINTAINED THROUGHOUT THE ENTIRE ABORT PROC. HOWEVER; DUE TO VERY LIMITED BRAKE EFFECTIVENESS AND THE HIGH GROSS WT OF THE ACFT; WE WERE UNABLE TO ADEQUATELY STOP THE ACFT IN THE REMAINING RWY LENGTH AVAILABLE. IN ORDER TO AVOID FURTHER DAMAGE TO THE ACFT BY RUNNING THROUGH THE RWY END LIGHTS; WE ELECTED TO EXIT THE L SIDE OF THE RWY JUST SHORT OF THE END AT A SPD OF 20-30 KTS. AT THIS POINT I HAVE NO EXPLANATION AS TO WHY THE TIRES FAILED. ALL 4 TIRES WERE JUST RECENTLY REPLACED AND VISUALLY WERE IN EXCELLENT CONDITION.