Free Length minus Set Length is the Preload.
5- Set the Preload
See the Product Search or your DVS Setup Sheet for Preload recommendations.
Adjust the preload by adding or subtracting washers or adjusting the Preload Spacer Length.
NOTE: RT Springs are often a different length than stock. This is how they are designed. You will have to make your own custom spacers.
The spring should always rest on a steel or plastic washer. It should NEVER rest on the aluminum fork cap. Be sure to take washer thickness into consideration.
On many Open-chamber forks washers are added at the bottom of the spring.
The Preload Washers must be retained so they cannot shift off center. If it shifts off-center on an Upside-down fork it will damage the fork tube.
6- Tighten the jam nut to the fork cap on the damping rod. Install the fork cap. Set the adjusters.