Is compressed air better than co2 with an expansion chamber?
In general, gases with fewer atoms per molecule act as stiffer spring-equivalents. Your car’s ride would seem harsher with tires filled with Argon compared to air (essentially a two-atom molecule equivalent) compared to CO2 compared to CH4. So using air would be better than CO2 in your application and Argon or Helium would be even better.
