Cam

Definition

A cam is the rotating, often elliptical wheel mounted at the end of a compound bow's limb that the string and cables run over. The shape and timing of the cam system define the bow's draw cycle, including how draw weight builds and where let-off occurs.

Why it matters

The cam system is what gives a compound bow its mechanical advantage, its draw-force curve, and its let-off, distinguishing single-cam, hybrid, and dual-cam designs. Cam timing and synchronization are central to how smoothly a compound draws and how well it tunes, making the cam a defining component of compound bow performance.

Related terms

• Let-Off
• Draw Weight
• Riser

Where it applies

Put this term to work in the guides, tools, and gear it relates to:

• Paper tune a compound bow
• How to choose your first bow