Bank angle and center of mass are related. You countersteer to shift the center of mass towards the inside of the turn, and then steer in the direction of the t

Bank angle and center of mass are related. You countersteer to shift the center of mass towards the inside of the turn, and then steer in the direction of the turn to maintain a balanced equilibrium at (more or less) constant speed in the turn. On a motorcycle, you can add throttle to bring the bank angle back to vertical. On a bicycle, you can steer deeper into the turn to perturb your center of mass back towards the vertical. You're a LOT more likely to notice this on a mountain bike than a road bike. If you start throwing a road bike around like you do a mountain bike in a tight section among trees, you're likely to end up using your helmet.