Air Volume Tuning

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In air shocks, the air takes the place of traditional coil springs. It works the same way by compressing the air to create a spring. Air volume is the amount of space available to fill with air and therefore determines the type of spring curve. Air volume tuning is changing the amount of volume to make the shock more progressive or linear.


These two terms are thrown around in mtb suspension lingo often but many people don’t truly understand the difference. Knowing and understanding the difference can drastically improve your feel of suspension and aid in tuning to fit your personal riding style.

Spring curves refer to the amount of force it takes to compress the spring at a given point in the travel. The amount of force it takes to continue to compress the spring determines if it is a linear or progressive spring curve.

Progressive spring curves take a variable amount of force to compress a shock throughout the entire stroke. That means it takes more force to compress the spring at the end of the travel than at the beginning. Progressive spring rates take very little force to initiate suspension movement then a high amount of force to fully compress or bottom out. This type of spring curve gives the rider great small bump compliancy and excellent bottom out resistance.

Linear spring curves take a very consistent amount of force to compress a shock throughout the entire stroke. For example, if we have a 300lb spring that is 12 inches long, it takes 300lbs to compress the spring 1 inch. The next inch of spring compression will take another 300lbs and so on until the spring becomes solid.


The DVO Topaz allows you to tune the volume in both the positive and negative side of the air canister. This is done with the provided air volume bands that come with your DVO Topaz. The tuning bands can be installed in the air shock in a matter of minutes without having to remove the shock from the bike. Watch the tutorial below to insure you tune your volume properly.