changed to some aztec pads after the stock hayes pads wore out after only 300 miles(is this typical?) these pads overheat- blacken the rotor and don't stop so good after a little use. Should i just throw these pads on the back and just get oem hayes pads for the front in the future, or is my 225lb lardass just more man than they can handle? Maybe i should opt for a bigger front rotor? I'd love some wisdom, internet.