Kawman
Seasoned Member
Lay something across the inside face of the rotor like the aluminum bar in my picture. Measure down to the mounting face of the rotor, as shown in my 37.99mm measurements. Measure the width of the bar you laid across the face. Subtract the bar width from the depth measurement to get the front hat height. The same measurement will be needed on a rear rotor to get the rear hat height.I have a new iron front rotor (5BW).
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