Quote:
Originally Posted by OrbitalEllipses
Thickness = heat capacity. Thinner rotors will overheat quicker with abuse, ultimately ending in cracks or other failure.
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Yes, thickness is important, they will cool faster.
Larger diameter will add mass, more heat capacity, but thinner rotors will not cool off as well.
It all a trade off of weight vs capacity.
These 12x.81 will work fine on the street, auto-x, but serious track use with some high friction pads will uncover their lack of capacity.
Edit- in simple term, two rotors of the same diameter but different thicknesses will stop the same for a while, the thinner has less mass/capacity and less airflow through the cooling vanes. The thinner one will get hotter faster and cool off slower.