Compound Bow Limbs: Materials, Types & Tuning

The limb of a bow is the upper and lower flexible section attached to the riser. When the bowstring is drawn, the limbs bend and store potential energy; when released, they snap back and convert that energy into arrow speed. Limb length, shape, and material all directly affect bow performance.

Limb Materials

Modern archery limbs are built from layered composite materials — fiberglass, carbon fiber, or wood laminates. Carbon fiber stores more energy per unit weight than traditional wood, which is why it dominates performance-oriented bows. The layered construction also determines how evenly a bow limb flexes across its length, influencing both speed and consistency. Early compound bows used solid fiberglass or wood-and-fiberglass combinations; today carbon, fiberglass, and composite blends are all common. The bow core material beneath those outer layers also contributes to how a limb stores and returns energy.

Types of Bow Limbs

Recurve Limbs

Recurve limbs curve away from the archer at the tips, allowing them to store more energy than straight limbs of the same length. They are standard in Olympic-style archery and are available in one-piece and takedown configurations. Takedown recurve limbs detach from the riser for easy transport, and swapping limb sets lets archers change draw weight without buying a new bow. The limb pocket connects each limb to the riser and typically houses a bolt for fine draw-weight adjustment.

Compound Bow Limbs

Compound bow limbs work differently from recurve designs. Instead of flexing toward the bowstring, they are pulled inward toward each other by the bowstring cables during the draw. This parallel orientation reduces felt recoil and vibration because the upward force at the top limb and the downward force at the bottom limb largely cancel out. Compound bow limbs are significantly stiffer than recurve limbs — a rigidity that improves energy efficiency and reduces sensitivity to temperature and humidity changes.

Compound bow limbs come in solid one-piece or split configurations. Split limbs create a wider limb stance that further improves efficiency and reduces vibration. Draw weight is adjusted by turning the limb bolts clockwise to increase weight or counterclockwise to decrease it — always adjust both bolts equally to keep the bow in tune. Many archers also attach limb dampeners directly to the limb surface to reduce vibration at the shot.

Limb Care and Inspection

Limb damage often begins as delamination — a separation of the composite layers — which can compromise structural integrity. Always inspect limbs for cracks or separation before shooting. A dry fire (releasing the string without an arrow) is one of the fastest ways to crack or destroy limbs and should always be avoided.