So the other week my buddy and I were doing a little TT of which part of it is on the paths. On the return end we had a tailwind and where slightly slower than our goal so my friend takes a pull and starts hammering. There are some dips on the mups and I noticed that as we were dropping into the dip our real wheels where lifting and slightly drifting to left (I noticed it on my bike then watched him to check if he was doing it as well, and he was.)

Fast forward a week or two and we are on another run through the streets tripping speed traps (very fun workout!) and we get caught in a traffic "situation". So I speed up, take the pull and we turn left. At this point I roll over a manhole and the back end lifts a bit again, and again it drifts slightly to the left.

So I wonder if this is the result of the pedal force on the crank? or bad form? Do you find that you slow or weaken your stroke if the possibility of a rear wheel lift is present? I just noticed this so I was curious.