How to Set Shock Spring Preload

Setting Shock Spring Preload is essential to good handling and control. It is calculated as follows:

Free length - Installed length = Spring Preload

We offer a suggested preload measurement for each bike as a starting point in the Product Search and DVS. Our suggested measurement should create the correct race sag if the spring rate is correct for the rider's weight.

In the photos shown below, the free length measures out to 151mm. The installed length measures at 142mm. Which tells us our spring preload is 9mm.

  Free Length

In this example 151

Installed Length


Free length - Installed length = Spring Preload

151 - 142 = 9mm Preload

►Shock Spring Fitment Guide

►Swingarm Geometry Form