I too seem to get more flat tires on my vanagon than my car i  have a  syncro and use 195  r 14 nokian c2 Hakkapeliitta i am always checking the tire pressure and seems like always going down.  i am wondering if there could be  any damages to the rims.  has any one else  had any experience  like this.?

peter cobb 
90 syincro westy