.32" X 10" O.D. ROTOR5 X 3.88" BOLT CIRCLEWEIGHS 5.2 LBS.HIGH-TECH RACING DESIGNLIGHTWEIGHT STEEL CONSTRUCTIONPRECISION MACHINEDSTEEL ROTORS HAVE APPLICATIONS IN ALL TYPES OF MOTORSPORTSSTEEL ROTORS PROVIDE A DURABLE LIGHTWEIGHT OPTION IN APPLICATIONS WHERE SUSTAINED TEMPERATURES REMAIN IN THE LOW TO MODERATE RANGE, AND HIGH HEAT SPIKES ARE ONLY OBSERVED ON AN INTERMITTENT BASISTHIS COULD BE ANYTHING FROM A HARD STOPPING DRAG RACE CAR AT THE END OF A QUARTER MILE, OR A HIGH SPEED STOCK CAR COMING IN FROM A QUALIFIER AT A SUPER SPEEDWAYSTEEL ROTORS CAN ALSO BE FOUND IN LIGHTER WEIGHT OPEN WHEEL CARS SUCH AS SPRINTS AND MODIFIEDS, AND A VARIETY OF LIGHT WEIGHT, OPEN WHEEL ROAD COURSE RACERSA SPECIAL ALLOY AND PROPRIETARY MANUFACTURING PROCESSES GIVE THESE ROTORS HIGH RESISTANCE TO THERMAL DISTORTION WITH EXCELLENT FRICTION AND WEAR CHARACTERISTICS AGAINST THE PADS