i know this is going to sound like a dumb question, mainly because i don't know how to ask it properly but ...



what do you gain from installing lightweight rotors



i know there is a general power gain, but what kind and how much of a gain can be expected?



also, is there a downside to putting in lighter weight rotors?



this is what i am looking at and trying to understand

http://www.racingbeat.com/resultset....rtNumber=10006

http://www.racingbeat.com/resultset....rtNumber=10007