I wonder if most or some of the riders can climb very heavy out of saddle and at high torque get the rear brakes to rub? I have notice in my the past year as my quads are getting stronger I am much better at really putting pressure on the pedals and can at times cause the rear brake to rub. Now I really keep the brake pads close to the rim I like to have very little action to get the brakes to work, they are less than mm away from the rim about 1/32 of an inch. I have 2 CF bikes and this particular one is a little more flexy the other I cannot get to do this. It is not the wheels I check this and build my own wheels. I just wondered how common this is under high torque.

It is not something I am worried about but years of long distance running make for quads that are not really strong. Now that I added the bike the quads are much stronger so I can push now like I never could. It has also helped my running.