Before revision: External forces on a bike and rider leaning in a turn: Weight in green, drag in blue, vertical ground reaction in red, net propulsive and rolling resistance in yellow, friction in response to turn in orange, and net torques on front wheel in magenta Spring between front fork and rear frame Forces If the bike and rider are considered to be a single system, the forces that act on that system and its components can be roughly divided into two groups: internal and external.
After revision: External forces on a bike and rider leaning in a turn: Weight in green, drag in blue, vertical ground reaction in red, net propulsive and rolling resistance in yellow, friction in response to turn in orange, and net torques on front wheel in magenta Spring between front fork and rear frame Force If the bike and rider are considered to be a single system, the forces that act on that system and its components can be roughly divided into two groups: internal and external.