Originally Posted by grolby

Ay ay ay. It's a distinction without difference when it comes to two-wheel vehicle dynamics. Countersteering is how you balance, how you control the amount of lean, how you initiate a lean, everything. You can wiggle around and do things by shifting your body weight (trials riders are experts at this, MTBers need to make use of it, too, and it doesn't hurt you as a roadie to have some ability there) but fundamentally bike control comes down to steering.