Suspension Setup: Compression is grip control

Compression is the opposite of rebound. Adjusting it allows you to control the compression process of your MTB suspension. Higher compression damping means the suspension compresses more slowly, both under downward pressure (like when you're out of the saddle) and impacts from the ground. Less compression damping results in a more active suspension but can feel jittery. More compression damping reduces the sensitivity of the suspension but provides greater resistance.

One feature of compression damping is what’s called platform damping, which adds to or replaces fine-tuning adjustments. Often, platform damping has only a few distinct settings, such as "Open - Pedal - Lock" on RockShox or the "Climb Switch" on Fox or Cane Creek. Unlike a true lock-out, even the closed mode does not completely block oil flow in the damping.

High-end suspension components often differentiate between high-speed and low-speed compression, allowing precise tuning of your MTB suspension. For example, more low-speed compression with less high-speed compression can prevent the suspension from sagging on small bumps but provide immediate travel for harsher impacts. Unlike rebound, compression has an interdependence between the speed of suspension movement and the high-speed or low-speed settings. Low-speed compression handles slow movements like out-of-the-saddle pedaling, while high-speed compression deals with rapid impacts involving high piston or shaft speeds.

Tip: While nearly fully closing compression damping on a climb is common, it is often ineffective and uncomfortable. As soon as you leave smooth asphalt, an active suspension that keeps your tires in contact with uneven terrain is generally more energy-efficient and better—especially on climbs.