How to Adjust the Strings on a Mathews Z7 Bow

Mathews makes a series of compound hunting bows. Among the product line is the Z7, a dual cam and pulley bow made for customizable use. The process of adjusting the Z7 is twofold: first determine your prime draw and arrow length, then adjust the bowstrings for your personal prime draw. Mathews includes a small Allen wrench usable on the SphereLock limb adjuster bolt on the bow. The adjustment is quickly done and requires only the Allen tool.

Things You'll Need

  • Tape measure
  • 3/16- or 7/32-inch Allen wrench
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Instructions

    • 1

      Stand up straight and spread out your arms. Have a friend measure the distance between your hands. Write this down in inches. Add 2 inches to your measurement and then divide the total by 2.5. For example, if your measurement is 70 inches, add 2 inches for a total of 72 inches. Divide this by 2.5 for a remainder of 28.8 inches. In this example, that is the draw and arrow length.

    • 2

      Set the Mathews Z7 down on a flat surface or against a knee and insert the Allen wrench into the bolt in the SphereLock on the upper bow shaft, at the end where the down shaft meets the cross shaft.

    • 3

      Turn the SphereLock clockwise to decrease the draw length or counterclockwise to increase it. The strings are calibrated to adjust automatically as the SphereLock bolt is turned.

    • 4

      Test the string adjustment by holding the bow in your shooting stance and then drawing the string back to your cheek. The string should come back to your lower jaw at the apex on the string.