CHAPTER X.

CRANKS, PEDALS AND AXLES.

The Early and Modern Hub—The Divided-Axle Mania—“One-Piece” Construction—Crank Throw and Variable Gear—Gear Ratio—Crank Drop—Shapes of Crank and Sprocket—Evolution of the Pedal and Axle—Ankle Motion and Its Advantages—The Ramsey Swinging Pedal. Pages 88-94