Originally Posted by
Andy_K
Yeah, the problem with classroom physics is that the things that were simplified away in order to get a manageable model are actually important once in a while. In this case I was imaging a brake pad the shape and size of a pencil eraser, and I'm fairly certain that the lateral flex would have some impact. So I guess you need enough pad material to maintain structural integrity. You may be right that temperature could also come into play (though probably not for a small difference like switching from road the MTB pads).
This issue also comes up with tires, which I think are more complicated because they deform a lot more. You just couldn't convince me that the size of the contact patch is never important in tire traction, especially over irregular road surfaces.
Without hijacking the thread yet while pads have been mentioned, I'm a fan of the outdated Scott - Mathauser pads. Most would not recommend them today for fear of the adhesive backing failing. (Thats for another topic).
Anyways, for old school pads and from my experience these are a great improvement vs. the stock pads set-up on centerpulls. I don't know if the cooling fins are a gimmick but the thin rubber pad minimizes mushiness feel. The aluminum backing is far more rigid than a tin shell. BTW: The center post is hollow. Carry on
