Systems, devices, and methods for driving a wheel of a bicycle

A bicycle drive assembly comprising:

• at least one clamp for fixing to a bicycle;
• a drive mechanism for driving a bicycle wheel;
• and
• a plurality of elongate supports extending from the drive mechanism to the at least one clamp,
• wherein when applied to a bicycle, a wheel of the bicycle passes partially between the elongate supports, such that the elongate supports are separated by the wheel of the bicycle,
• and wherein when applied to a bicycle, the at least one clamp clamps at least one leg of a bicycle fork, and wherein the plurality of elongate supports extend substantially perpendicularly from the at least one leg.

A bicycle drive assembly comprising:

• at least one clamp for releasably fixing to a bicycle having a bicycle fork on opposite sides of a wheel of the bicycle, wherein the at least one clamp engages the fork;
• a friction drive for driving the wheel of the bicycle;
• and
• a plurality of elongate supports extending from the friction drive to the at least one clamp,
• wherein the wheel of the bicycle passes partially between the elongate supports, such that the elongate supports are separated by the wheel of the bicycle, and wherein the at least one clamp is readily removable from the bicycle,
• and wherein when applied to the bicycle, the at least one clamp clamps at least one leg of a bicycle fork of the bicycles, and wherein the plurality of elongate supports extends substantially perpendicularly from the at least one leg.