---
title: "Bowhunting Prep: Static Spine vs. Dynamic Spine"
description: "The basic definition of arrow spine is how much an arrow bends (it's the number printed on your arrows, usually 3000-4000). But there's more to it than that. In the real world archers have to deal with dynamic spine: your arrow bending and flexing in three dimensions. So, when you tune your bow, consider your broached weight and arrow length, because both have an impact on dynamic spine."
date: "2014-08-26"
modified: "2014-08-26"
authors:
  - name: "The Editors"
    link: "https://www.outdoorlife.com/authors/the-editors/"
url: "https://www.outdoorlife.com/blogs/hunting/bowhunting-prep-static-spine-vs-dynamic-spine/"
categories:
  - "Bow Hunting"
  - "Bow Hunting Gear"
  - "Gear"
  - "Hunting"
  - "Hunting Gear"
---

# Bowhunting Prep: Static Spine vs. Dynamic Spine

![](<https://www.outdoorlife.com/wp-content/uploads/2019/01/22/UZVFWBZ2J2NK52A7GPY3S5U74Y.jpg>)

The basic definition of arrow spine is how much an arrow bends (it's the number printed on your arrows, usually 3000-4000). But there's more to it than that. In the real world archers have to deal with dynamic spine: your arrow bending and flexing in three dimensions. So, when you tune your bow, consider your broached weight and arrow length, because both have an impact on dynamic spine.