Thread: X5 Cross Drilled Rotors? (Rotors With Holes)
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Old 03-20-2010, 06:54 PM
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kishg kishg is offline
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what makes you guys think the holes improve cooling? cooling in a brake rotor is from the heat being radiated off the rotor surface area. holes actually reduce that surface area. the only way holes are useful is to reduce rotating mass in a race car and those typically have brake cooling ducts.
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