Disc rotor thickness

[guru]

Does anyone know what the thickness of a new Dura Ace disc brake rotor should be?

[yinzerniner]

Does anyone know what the thickness of a new Dura Ace disc brake rotor should be?

I have 1.75 for 140 and 1.7 for 160 on the RT900 rotors. Quite a bit thinner than the RT99s I usually use.