The great majority of OEM disk brakes are single piston and there is no
deflection of the disk because the caliper body is free to move sideways on
lubricated slides.

Randy


"Leo Lichtman" wrote in message
...

"gfulton" wrote: There's no deflection of the disc. The caliper floats,
providing the pins aren't corroded.
^^^^^^^^^^^^^^^
There is no deflection of the disk with caliper brakes. What I was trying
to say is that if, instead of a caliper, you had a piston pushing on one
side of the disk, there would be a deflection.