Flat
Mounting face sits in line with the friction ring — no step, no offset.
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Hat Shaped
Mounting face steps inboard of the friction ring, forming a top-hat profile.
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U-Shaped
Hub section forms a deep U channel between the ring and the mounting face.
View rotors →Not sure which one you have? Measure the outside diameter and count the mounting holes, then send us the numbers — we will match it from the old part.