I have Continental Vanco2's on my 85 Westy.  I inflated the tires to
what's on the sidewalls of the tires (60psi IIRC).  The Vanagon says
30/40.  I think inflating less than the sidewall says will decrease tire
life substantially?  It rides like a tank at this point but I can live
with that for a while until I find a solution and $$.