I believe,pretty much sure, that I have a leak in the preload shock/air bag system in my RT. Filled it to 70 PSI and let it sit, just weight of the bike/trike itself for five hours. Perssure dropped from the 70 to 32 in about four hours. I checked the Schrader valve and made sure the center pin was tight and it was. Are there other connections that I could check myself? Are these preload air bags prone to leaking and any idea what the dealer would charge to repair/replace? Thanks!