Bow AMO Length Calculator: How To Measure Recurve Bow String Length?

Recurve bows are a popular choice among archers due to their versatility and ability to shoot accurately over long distances.

However, ensuring that the bow is properly set up and maintained is essential for optimal performance.

One important aspect of a recurve bow is the length of the string, as it plays a crucial role in the bow’s ability to shoot accurately and with power.

Measuring the string length of a recurve bow may seem like a straightforward task, but it’s important to take the time to do it accurately.

The wrong string length can lead to issues with the bow’s performance, including poor accuracy, lack of power, and even damage to the bow.

There are two main methods for measuring recurve bow string length: the manual method and the AMO method. Both methods are effective, but they have their own set of steps and considerations.

In this article, we’ll take a look at both methods and provide tips and tricks for accurately measuring the string length of your recurve bow.

What is AMO Referring For?

Before we dive into the specifics of how to measure bow string length, it’s important to understand the AMO standard.

The AMO (Archery Manufacturers and Merchants Organization) is a standardized measurement system used in the archery industry to ensure consistent sizing of bows and bow components.

This means that all bows with the same AMO length will be compatible with the same size strings, arrows, and other components.

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How To Measure Recurve Bow String Length?

First One: Manual Method )

The manual method for measuring bow string length involves using a tape measure or other measuring tool to physically measure the total length of your bow. Here’s how to do it:

Step 1: Measure the total bow length (BL) from one end of the bow to the other. Make sure to measure along the curve of the bow and not straight across, as this will give you an accurate measurement.

Step 2: Subtract 4 inches from the total bow length to determine the bow string length (BSL). This is the length that you will need to purchase or make your bowstring.

Here’s a simple formula to follow: BSL = BL – 4.

Here’s an example of how to use the manual method to determine your bow string length:

Let’s say your bow has a total length of 62 inches. To find the bow string length, you would subtract 4 inches from the total bow length:

BSL = 62 inches – 4 inches = 58 inches

This means that you would need a bowstring that is 58 inches long.

AMO Method:

The AMO method for measuring bow string length involves using a standardized measurement system and a bowstring length chart specific to your bow’s AMO length. Here’s how to do it:

Step 1: Measure the AMO length of your bow. This can usually be found in the manufacturer’s specifications or on a label on the bow.

Step 2: Measure a bow string length chart specific to the AMO length of your bow. There are a variety of charts available online or in archery stores that provide recommended bow string lengths for different AMO lengths.

Here’s an example of how to use the AMO method to determine your bow string length:

Let’s say your bow has an AMO length of 64 inches. You can use the following chart to determine the recommended bow string length:

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Bow AMO Length Calculator

Bow AMO Length Calculator

AMO LengthRecommended Bow String Length
62 inches58 inches
64 inches60 inches
66 inches62 inches

Based on this chart, the recommended bow string length for a bow with an AMO length of 64 inches is 60 inches.

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How I can Get the Maximum Benefit to Choose the Perfect Length?

Here are a few tips and tricks to keep in mind when measuring the string length of your recurve bow:

Make sure to use a flexible measuring tape or string to get an accurate measurement. Rigid measuring tools or objects may not conform to the shape of the bow and could give you an incorrect measurement.

Consider the length of the bowstring serving when measuring. The bowstring serving is the material wrapped around the string at the nocking point and at the center serving.

It adds thickness to the string, which can affect the overall length. Make sure to account for the serving when measuring.

Make sure to account for any twists or turns in the string when measuring. If the string has any twists or turns, it could affect the overall length.

Make sure to straighten out the string before measuring to get an accurate measurement.

Read Also: How To Increase Draw Weight On A Recurve Bow?

Can I use a different string length than what is recommended for my bow?

While it is possible to use a string length that is different from the recommended length for your bow, it is generally not recommended.

Using a string length that is too long or too short can affect the performance and accuracy of your bow, and it can also increase the risk of accidents or damage to the bow.

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It’s always best to follow the recommended string length for your specific bow.

What happens if my string is too long or too short?

If your bow string is too long, it can affect the performance of your bow by decreasing the amount of power and speed that the bow can generate.

This can lead to inaccurate shots and reduced accuracy.

On the other hand, if your bow string is too short, it can cause the bow to become overly tense and difficult to draw.

This can increase the risk of accidents or damage to the bow, as well as decrease the accuracy and performance of the bow.

It’s important to use the correct bow string length for your specific bow to ensure optimal performance and safety.

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Can I measure my bow string length without a chart or calculator?

While it is possible to measure your bow string length without using a chart or calculator, it is generally not recommended.

Using the manual method or the AMO method with a chart or calculator will provide the most accurate and reliable results.

If you don’t have access to a chart or calculator, it’s best to consult a professional or visit an archery store to have your bow string length measured accurately.

Conclusion

Accurately measuring the length of your recurve bow string is essential for proper function and performance.

Whether you use the manual method or the AMO method, make sure to follow the steps carefully and consider any tips and tricks to ensure an accurate measurement.

Remember, the wrong string length can lead to issues with the bow’s performance, so it’s worth taking the time to get it right.