Originally Posted by
HD3andMe
Hmmm, it’s not about heat dissipation? That flies in the face of everything I learned and experienced tracking cars, as well as my couple of decades of experience with mtb discs on big descents.
There are also lots of other folks who disagree with you:
https://www.mtbphd.com/post/2019/08/...-bigger-rotors
There are many more helpful links available from Mr. Google if you want to educate yourself.
Good luck.
I believe he meant it is not ONLY about heat dissipation.
It is also about mechanical advantage (Reason #3 in the link you provided).