That's right. I'm trying to see if anyone has ever used regular compressed air in their rear shock instead of nitrogen. I'm aware of the stable properties of nitrogen, especially over temperature, but I don't have any compressed nitrogen so I want to try regular compressed air. My only concern is the heat from the exhaust pipe will heat up the air in the rear shock increasing the PSI. Using air would I need to back off on the 120 psi.? Say something like 100psi. to allow for the increased pressure due to exhaust pipe heating of shock resouvoir?