The Mathews Z7 Draw Length Adjustment refers to the process of modifying the bow’s draw length to suit the specific needs and preferences of the archer. 

The Mathews Z7 compound bow allows for draw length adjustment, which is a crucial aspect of bow tuning. 

By changing the draw length, you can optimize the bow’s performance and ensure that it fits your body and shooting style perfectly.

Mathews Z7

The Mathews Z7 is a renowned compound bow that has been a favorite among archers and bowhunters for its exceptional performance and versatility.

It was a flagship model in the Mathews lineup, known for its precision and accuracy. While my previous response provided a detailed guide on how to adjust the draw length of the Mathews Z7, let’s take a moment to appreciate some of its key features and qualities:


Key Features of the Mathews Z7 are as follows:

  • Adjustable Draw Length: One of the standout features of the Mathews Z7 is its adjustable draw length, which allows archers to customize the bow to their specific needs and preferences.
  • Brace Height: The Z7 typically had a brace height of 7 inches, which strikes a balance between speed and forgiveness, making it suitable for a wide range of archery activities.
  • ATA Length: With an axle-to-axle length of 30 inches, the Z7 offers a compact and maneuverable design, making it versatile for both hunting and target shooting.
  • Draw Weight: The Mathews Z7 allowed for a draw weight range of 40 to 70 pounds, catering to a broad spectrum of archers, from beginners to experienced shooters.
  • IBO Speed: It boasted an impressive IBO (International Bowhunting Organization) speed of 332 feet per second, ensuring that arrows reached the target quickly and with power.
  • Mass Weight: The bow’s mass weight of 4 pounds struck a balance between being lightweight enough for ease of carry and heavy enough to provide stability and accuracy.
  • Let-Off: The Z7 featured a let-off of 80%, reducing the amount of holding weight at full draw, which is particularly beneficial for maintaining accuracy during the aiming process.
  • Quality Construction: Mathews is known for its craftsmanship, and the Z7 was no exception. It was built with precision and durability in mind, ensuring that it could withstand the rigors of hunting and archery sports.

Why Adjust the Draw Length of a Mathews Z7

There are several reasons why you might need to adjust the draw length of your Mathews Z7:

  • Personal Fit: Everyone has a unique body structure, and a bow with the correct draw length ensures that you can comfortably and consistently shoot with proper form.
  • Accuracy: Proper draw length alignment allows for more precise aiming and shooting, improving your overall accuracy.
  • Comfort: An incorrectly set draw length can cause discomfort, strain, and fatigue while shooting. Adjusting it can enhance your shooting experience.
  • Consistency: Consistency in your draw length is vital for consistent arrow flight and shot placement.
  • Performance: Optimizing the draw length can impact arrow speed, energy, and kinetic efficiency, influencing the bow’s performance.

When to Perform Mathews Z7 Draw Length Adjustment?

You should consider adjusting the draw length of your Mathews Z7 in the following situations:

  • Initial Setup: When you first acquire the bow, it’s essential to set the draw length to your specifications during the initial setup process.
  • Change in Physical Condition: If there’s a significant change in your physical condition, such as growth (for young archers) or changes in muscle mass, you may need to adjust the draw length to accommodate these changes.
  • Comfort and Consistency: If you find that the current draw length is uncomfortable, causing strain, or affecting your consistency in shooting, it’s a good idea to consider an adjustment.
  • Tuning and Fine-Tuning: As part of regular bow maintenance and tuning, you should check and adjust the draw length to ensure that the bow is performing optimally.
  • Experimentation: Some archers may want to experiment with different draw lengths to find the one that suits them best for various shooting scenarios.

Remember that adjusting the draw length should be done carefully and accurately, following the manufacturer’s guidelines and using the necessary tools. It’s also a good practice to consult with a knowledgeable archery professional or technician if you’re uncertain about the process, as improper adjustments can negatively impact your shooting performance and safety.

Adjusting Draw Length for Adjustable Cams

The Mathews Z7 is renowned for its adjustable draw length, which ranges from 25 to 30 inches in half-inch increments. The key to this adjustment lies in the cams, so for each desired draw length, you’ll need a unique cam.

Tools Required:

  • Wrench
  • Bow Press
  • Thread Sealant
  • Pliers
  • Screwdriver

Step-by-Step Process:

  1. Cam Notches: Begin by locating the progressive notches on your bow’s cam. These notches are typically labeled 1 through 4 or 5, or sometimes A through D or E. Each notch represents a 1-inch variation in draw length.
  2. Remove Setscrews: Using a wrench, carefully remove the setscrews from the cams. It’s worth noting that with flexible cams, you won’t need to release tension from the bow limbs or strings to adjust the draw length.
  3. Adjust the Cam: Now, here’s where the magic happens. Twist the cam’s control gears one notch up or down to increase or decrease the draw length. For instance, if you want to increase it by 1 inch, simply twist the cam left once.
  4. Apply Thread Sealant: To ensure everything stays in place, apply thread sealant to the setscrews before replacing and securing them in the cam.

Remember, you can only adjust the cam as much as the control roller permits.

Adjusting Draw Length for Non-Adjustable Cams

If your Mathews Z7 comes with non-adjustable cams, the process is a bit different, but equally manageable.

Tools Required:

  • Bow Press

Step-by-Step Process:

  1. Bow Press Setup: Carefully follow the guidelines provided by your bow press supplier to place your bow securely in the press. Activate the press to relieve all tension from the bow limbs.
  2. Remove Cables: Slip your fingertips beneath the bow cords and gently remove them from the cam slots. After that, you can proceed to take out the camshafts.
  3. Detach Cams: At the end of the bow’s limb, you’ll find a screw affixed to the base of the crankshaft holding the bow’s cams in place. Use your trusty wrench to extract this bolt from the camshaft.
  4. Deal with Circlips: Detach the circlips from the camshaft. To do this, insert the rivets of the circlip pliers into the holes at the end, split the circlips with pliers, and then lift them off the camshaft.
  5. Camshaft Removal: Use your fingers to carefully take the camshaft out of the groove at the tip of the bow arm. If it’s stuck, a small screwdriver can help pry it free.
  6. Swap the Cams: Extract the old cams from the limbs and replace them with new ones sized for your desired draw length.
  7. Reassemble: Reconnect the camshaft and fasten the bolt or circlip securely to the camshaft’s end. Place the bow cables into the new cams’ slots, and then carefully remove the bow from the press.
Mathews Z7 draw length adjustment

Frequently Asked Questions

What is the Draw Length in Archery?

Draw length refers to the distance between the bowstring’s position at full draw and the grip of the bow. It is a crucial measurement in archery as it determines the distance an archer can pull the bowstring and release an arrow accurately.

Why is Draw Length Important?

Draw length is important because it affects an archer’s shooting accuracy, comfort, and overall performance. Using the correct draw length ensures proper alignment and consistency in shooting.

How Do I Measure My Draw Length?

To measure your draw length, stand upright with your arms extended to the sides, and have someone measure the distance between the tips of your middle fingers. Subtract 1 to 1.5 inches from this measurement to determine your approximate draw length.

Can I Adjust My Bow’s Draw Length?

Some bows, especially compound bows, allow for draw length adjustment. This adjustment is typically made by changing modules, cams, or settings on the bow. Always follow the manufacturer’s guidelines for adjusting draw length.

What Happens if My Draw Length is Incorrect?

If your draw length is incorrect, it can lead to discomfort, reduced accuracy, and inconsistency in your shots. It’s essential to have the right draw length to maximize your archery performance.

Is Draw Length the Same for All Bows?

No, draw length can vary between different types and models of bows. Compound bows, recurve bows, and longbows may have different draw length measurements.

Can I Change My Draw Length as I Improve in Archery?

Yes, as your strength and skill in archery improve, you may want to adjust your draw length to accommodate these changes. However, it’s important to do so gradually and with proper guidance.

What Happens if I Use a Draw Length That’s Too Long or Too Short?

Using a draw length that is too long can lead to overextension and loss of accuracy. Using a draw length that is too short can cause discomfort and reduced power in your shots.

How Do I Fine-Tune My Draw Length for Optimal Performance?

Fine-tuning your draw length involves experimenting with small adjustments to find the length that provides the best balance of comfort and accuracy. Consulting with an experienced archery professional can be helpful.

Are There Different Draw Lengths for Different Types of Archery (e.g., Target Shooting vs. Bowhunting)?

Yes, the ideal draw length may vary depending on the type of archery you are pursuing. For example, some target archers may prefer a longer draw length for stability, while bowhunters may opt for a shorter draw length for maneuverability.

Can I Change My Draw Length on My Own, or Should I Seek Professional Help?

It’s advisable to seek professional guidance when making significant draw length adjustments, especially on compound bows. An experienced archery technician can ensure the changes are made safely and accurately.

Is the Draw Length the Same as the Arrow Length?

No, the draw length is different from the arrow length. Draw length is about the archer’s form and how they draw the bowstring, while arrow length is about the physical length of the arrow, which should also be chosen appropriately for the archer’s draw length.