What Is Arrow Spine? A Comprehensive Guide

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Have you ever wondered what an arrow spine is in archery? When using archery for hunting, it is crucial to know about the arrow spine. Don’t worry! Today, you are going to learn what an arrow spine is and why it is important.

A proper arrow spine is essential for improved accuracy and overall performance. A wrong arrow spine can lead to erratic arrow flight and inconsistency in shot, which can lead to injury for you. For humane killing, it is essential to find the right arrow spine. So, What is an arrow spine?

What Is Arrow Spine.

Arrow Spine

The measurement of the arrow stiffness is called the arrow spine. It affects how the arrow flies and hits the target. It is calculated by how much the arrow bends. If the spine number is low, the arrow’s stiffness is high. 

You are not completely clear at all. Let’s dive right in to clarify about arrow spine and its importance.

What Is Arrow Spine?

To answer which way your arrow spins, you gotta learn what is arrow spine mean? 

What Is Arrow Spine

The measurement of the arrow stiffness is called the arrow spine. It affects how the arrow flies and hits the target. It is calculated by how much the arrow bends or 

If the spine number is low, the arrow’s stiffness is high. 

So, with the help of the arrow spine, you can determine your arrow stiffness based on arrow weights, draw length, draw weight, and arrow materials. 

You should select the proper arrow spine to improve archery consistency and accuracy. 

Then, what arrow spine do I need? Or what arrow spine should I use?

If you want a stiffer arrow, you should select the lower spine number. 

But,

if you need a lower, stiffer arrow, then choose a higher spine number. For details, you can get help from an arrow spine chart. 

So, which will you choose between 250 and 300 spine arrows?

The 250-spine arrow is stiffer and suitable for higher draw-weight bows. It can transfer energy quickly and provides more stability and flexibility.

On the other hand,

300 spine arrows are more forgiving and provide a smooth feel. It is better for the beginner. It is suitable with a lower draw weight.

So, what does 500 spine mean in arrows? 

500 spine means it’s a higher spine number and is more flexible than a lower spine number like 300 spine. A shorter arrow is stiffer than a longer one.

What Is The Difference Between Arrow Spine And Arrow Weight?

You know that draw weight and arrow spine are two different concepts. Let me explain for your easy understanding. Here is the difference:

What Is The Difference Between Arrow Spine And Arrow Weight

Arrow Spine

The Arrow spine is the measure of the arrow stiffness. It influences how the arrow flies and hits the target

So, how will you measure it?

It is measured by how much it bends or flexes due to a weight applied. The lower stiffer the arrow, the higher the spine number.

Arrow Weight

Arrow weight refers to the actual weight of the arrow, established by the weight of the arrowhead and the materials used in its construction. 

The amount of force pushing the arrow is determined by its weight, so it is considered.

You can use a spine-selection chart every arrow company provides to determine the arrow shaft that will work best for your draw weight and arrow length.

What Is The Importance Of Arrow Spine?

Do you know what is arrow spine measured in?

The Arrow spine measures an arrow’s stiffness, which affects how it flies and hits the target. The stiffer the arrow, the lower its spine number. 

So, what is the importance of it?

The correct arrow spine is essential for improving arrow grouping and achieving maximum accuracy. 

What Is The Importance Of Arrow Spine

Is there any disadvantage with the wrong arrow spine?

You will get erratic arrow flights and poor shooting groups if you do not use the correct arrow spine for your bow setup. 

An underspined arrow will veer right, whereas a stiff arrow will veer slightly left. An arrow’s spine rating is simply a measurement of its stiffness. 

The same Easton arrow is available in several stiffness levels: the lower the number, the stiffer the arrow. 

Haven’t you understood? 

Here is an example for your easy understanding. A 330 arrow is stiffer than a 500 spine arrow. What is the arrow spine number?

In general, the spine rating number refers to arrow spine numbers such as 300,400,500 etc.

Another example for your easy understanding:

So, Is 300 spine stiffer than 350?

Yes, the 300 spine is stiffer than 350 spine. Because 300 spine is lower than 350 spine. So, 300 is more stiffer.

Are you conscious about alignment? So,What is arrow spine alignment?

The method of aligning each arrow’s stiff plane in the same direction is known as “arrow spine alignment.” This increases accuracy and makes sure that every arrow shoots in the same direction.

Arrow Spine Chart

Here is an arrow spine chart for your easy understanding.


Note: Arrow length is measured from the throat of the nock to the end of the insert.Point Weight = The total combined weight of the point, insert Ballistic Collar and FACT weight.
COMPOUND BOW/IBO SPEED 315+(FPS)
DRAWWEIGHTPONT WEIGHT(grains)ARROW WEIGHT(INCHES)
10012515025”26”27”28”29”30”31”32”
30-34700600600500500500400400
35-3930-34600600500500500400400400
40-4435-3930-34600500500500400400400340
45-4940-4435-39500500500400400400340340
50-5445-4940-44500500400400400340340300
55-5950-5445-49500400400400340340300300
60-6455-5950-54400400400340340300300300
65-6960-6455-59400400340340300300300250
70-7465-6960-64400340340300300300250250
75-7970-7465-69340340300300300250250200
80-8475-7970-74340300300300250250200200
80-8475-79300300300250250200200200
80-84300300250250200200200150
COMPOUND BOW/IBO SPEED 315-(FPS)
DRAWWEIGHTPONT WEIGHT(grains)ARROW WEIGHT(INCHES)
10012515025”26”27”28”29”30”31”32”
30-34700600600600500500500400
35-3930-34600600600500500500400400
40-4435-3930-34600600500500500400400400
45-4940-4435-39600500500500400400400340
50-5445-4940-44500500500400400400340340
55-5950-5445-49500500400400400340340300
60-6455-5950-54500400400400340340300300
65-6960-6455-59400400400340340300300300
70-7465-6960-64400400340340300300300250
75-7970-7465-69400340340300300300250250
80-8475-7970-74340340300300250250250200
80-8475-79300300300300250250200200
80-84300300300250250200200200

So, what spine arrow is for a 70-pound bow?

The spine arrow for a 70-pound compound bow ranges between 300 to 400 spine for carbon arrows and 2117 to 2315 spine for aluminum arrows. 

The spine rating can be different based on the point weight and your bow’s draw weight.

RECURVE BOW
DRAWWEIGHTPONT WEIGHT(grains)ARROW WEIGHT(INCHES)
10012515025”26”27”28”29”30”31”32”
30-3430-34700600600600500500500400
35-3935-3930-34600600600500500500400400
40-4440-4435-39600600500500500400400400
45-4945-4940-44600500500500400400400340
50-5450-5445-49500500500400400400340340
55-5955-5950-54500500400400400340340340
60-6460-6455-59500400400400340340340300
65-6965-6960-64400400400340340340300300
70-7470-7465-69400400340340340300300300
75-7975-7970-74400340340340300300300250
75-79340340300300250250250250

So, what spine arrow for a 50-pound recurve?

A spine around 340 to 500 is suitable for your 50-pound recurve bow. 

For example, 

150 grains of weight and 30 inches of a 50-lb recurve bow may require a 340-spine arrow. Spine arrows can vary depending on point weight, arrow length, and other factors.

Arrow Spine For Different Archery Disciplines

Different arrow spines are needed for different archery disciplines. So, what should the arrow spine be matched to?

Arrow Spine For Different Archery Disciplines with chart

The bow’s draw weight, the arrow’s length, and its point weight all contribute to the spine of an arrow.  So, these are essential to be matched,

Based on the draw weight of the bow, the recommended arrow spine for various archery disciplines is displayed in the following table:

Archery DisciplineBow Draw WeightRecommended Arrow Spine
Field Archery20-30 lbs.1000-1200 spine
Field Archery40-50 lbs.600-800 spine
Field Archery50-60 lbs.400-600 spine
Target Archery40-50 lbs.600-800 spine
Target Archery50-60 lbs.400-600 spine
Bowhunting50-60 lbs.400-600 spine
Bowhunting60-70 lbs.300-400 spine

Are you a recurve bow lover? So, what arrow spine for recurve bow?

Shortly, the answer is the ideal arrow spine for a 45 lb recurve bow is generally considered to be 550-600. Different types of arrow spine calculators are available. You can find out your spine number easily by using them.

 What Spine Arrow Should I Shoot?

The spine usually gets weaker the higher the number. 

For example,

300-spine arrows are the stiffest; other common spine ratings are 400, 500, and 600. The arrow manufacturer recommends the optimal spine for different draw weights, arrow lengths, and point weights.

 You can use an arrow spine chart to help you determine how stiff your arrows need to be. The chart will give you a spine rating corresponding to your specific archery setup.

You can use the Easton arrow spine chart and Victory arrow spine chart for easy finding.

A query may arise in your mind  -which way does your arrow spin?

The arrow spin depends on your shooting style and bow type. For right-handed shooters, the arrow should spin counterclockwise when released, and for left-handers, it should spin clockwise. 

How Do I Find The Correct Arrow Spine For Me?

Arrow manufacturers provide charts to assist you in determining the proper spine for your higher or lighter arrows. 

However, you must take simple measurements to find your correct spine number. Here I am explaining with an example for your easy understanding:

Length Of The Draw

So, how do i measure my draw length?

To determine your arrow spine, first choose your draw length. This can be determined in various ways at your local archery shop. You can find it at home by measuring your arm span and dividing by 2.5. 

Get clear with an example:

I think that you have a 60-inch arm span. So, your draw length is 24 inches (60 / 2.5 = 24). 

Arrow Length

Determine your arrow length by measuring your draw length. Add 1 to 2 inches to your draw length to find your arrow length.

Thus, 

If your draw length is 26 inches, your arrow length should be 27 to 28 inches. This extra 1 to 2 inches will provide extra accuracy and safety.

Draw Weight

Determining your draw weight, or poundage is the final step. 

Are you a beginner? Don’t know how to measure it? Don’t worry it isn’t rocket science.

You can easily measure this at your neighbor’s archery store using a scale. You can buy an archery scale if you want to find out at home. They are incredibly simple to use and reasonably priced. 

Investing in a digital scale is highly recommended if you intend to perform any adjustments or tuning at home, as it will ultimately save you time and money.

Use Arrow Spine Chart

You can use an arrow spine chart to determine the arrow spine for your specific bow setup quickly. They consider arrow length, draw, and point weight to identify your correct arrow spine.

Steps To Adjustments Spine In Arrow

To adjust the spine of an arrow, perform the following steps:

Step 1: Determine Draw Weight

The first step is to determine your bow’s draw weight. This information can be found in your bow’s manual or by contacting the manufacturer.

Step 2: Determine Arrow Length

The next step is to determine the length of your arrow. You can do this yourself or have it done at an archery shop.

Step 3: Determine Arrow Point Weight

The third step is to determine the weight of your arrow points. This is the weight of the broadhead or field point you intend to use.

Step 4: Use An Arrow Spine Chart

After determining your draw weight, arrow length, and arrow point weight, you can use an arrow spine chart to determine the correct arrow spine for your setup.

Step 5: Use An Arrow Spine Chart

After determining your draw weight, arrow length, and arrow point weight, you can use an arrow spine chart to determine the correct arrow spine for your setup.

Frequently Asked Questions

What Does 500 Spine Mean In Arrows?

500 spine means a higher spine number and is more flexible than a lower one, like 300.

What Does 350 Spine Mean In Arrows?

A 350 spine is stiffer than a 400,500 or 600 spine but more flexible than a 300 or lower spine arrow.

What Are 300 Spine Arrows Good For?

The spine arrows at 300 are stiffer spine than those at 400, 500, and 600. They are suggested for heavier arrow points, longer arrow lengths, and higher draw weights. Using the correct arrow spine will assist in your consistency and accuracy.

Are 300 Spine Arrows Good?

For higher stiffer arrows, 300 spine arrows are good. But for lower, stiffer arrows, 300 spines could be better. A 300 spine arrow means a higher stiffness of the arrow.

Is My Arrow Spine Too Weak?

If your arrow flight is stable or consistent, your arrow may be too weak spine. So, you should use a proper spine arrow for a durable and consistent arrow in flight.

What Does 400 Spine Arrow Mean?

By 400 spine, it means that it is stiffer than 500 or 600 spine but more flexible than 300 spine or lower spine arrow.

Final Words

What is arrow spine? The measurement of the arrow stiffness is called the arrow spine. It affects how the arrow flies and hits the target. It is essential  for spine measurements for improved accuracy and overall performance.

A wrong arrow spine can lead to erratic arrow flight and inconsistency in shots. So, be aware of using lighter or heavier arrows. Be aware of your safety concerns because a wrong spine can lead to injury for you.

Bob Magic

Written by

Bob Magic

Meet Bob Magic, the archery maestro. A National Champion, “Coach of the Year,” and gold medalist. Bob simplifies archery, ensuring your bullseye success. Whether you’re a newbie or a pro, let Bob’s magic guide your arrow.

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