Which E-Ring should I choose?

Deciding which Elastomer Rings (E-Rings) to choose is all about personal preference. The harder the density, the less vibrations from the snow and other factors it will absorb. However, it will give you maximum edge performance. The softer the density, the more vibrations it will absorb but with a slight loss in edge performance. Do you want a softer ride, or maximum edge control?
The weight of the rider compresses the E-Ring so this also determines how much "movement" you get out of the system. Harder E-Ring, less movement, softer E-Ring, more movement. Also, if you are over 200 pounds you should seriously consider the medium (blue) or hard (red).