Hrmm...I've boiled RBF600 fluid at Sebring before ducting which would mean the pads/rotors would have been well over the 600-degree boiling point, but still no hub problems. Like I said, throw some good grease in the hubs cause that's what lubricates and it's not like the metal is going to melt anytime soon (though I did melt the edge of one front caliper piston down when the Carbotech pad material ran out in one race weekend 2 laps from the end of the race, grrrr, haha).