I am well aware of the options I am reasonable mechanic and I simply opened the brakes up a little and it went away. I weigh 173 pounds at 6'2 and have no idea the watts I don't have a power meter. Yes the wheels do in fact flex I just wonder if anyone else have had brake rub in these situations. For me it was never an issue till I have gotten much stronger on the bike. As a runner I have plenty of wind and endurance but the quads were pretty weak. I hated to even stand at all to pedal it was to tiring but I could easily pedal all day. Well now I sort of like to get up and climb out of the saddle on short grades going up, it gives the rear a rest and I go faster over all. I guess it just took me by surprise and it even leaves me questioning just how true a wheel needs to be. I get anal and with a well made rim can get the them laterally true to less than a 1/3rd of a mm. They have fellows in the mechanic forum getting wheels to have almost no runout.