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Originally Posted by SNsLude
Just picture it yourself... You say those 2 screws are there for support of the rotor when the caliper is off. Are you trying to tell me that's ALL they are for lol? Your rotor is already gonna be sitting on the 4 lugnuts before you can put the caliper back on so the purpose that you're trying to state the 2 philips heads are for, for holding the rotor on when putting the caliper back on, is irrelevant. Picture the caliper off and the 2 philips head off. Your rotor is basically just sitting on the 4 bolts for your lugnuts. Last time I checked, the rotors don't "squeeze" perfectly on the 4 bolts for a snug tight fit. There is obviously gonna be some small freeplay which the 2 philips head eliminates.
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What are you talking about? When the rotor is sitting on the wheel studs, it doesn't stay in place, because of the free play you were talking about. It falls down at an angle. It has to be upright against the hub when you put the caliper on, so with the screws in you don't have to brace it with your hand.
Sure, there may be some free play around the wheel studs, but it's not moving when you brake. Even if it did move, it would just jam up againt the studs in its rotational direction (backward) and stay there. But I can assure you from common sense that it's the wheel studs (and the pressure of the wheel against the rotor against the hub) that's supporting your braking force, not those two little screws. If the screws were keeping the rotor from rotating against the studs, they would be doing all the work of braking. Think about it.
Besides, brake shudder is happens when the rotor is warped.
