FWIW I just got delivery on 4 Michelin Agilis 61 185 R-14 reinforced tires.
These are the correct tires for the Westfalia Vanagon.

I had a hard time finding them. The usual, told they were discontinued and
the like at local tire stores. Anyway I got mine at Tirerack.com  for $429.92
including shipping via UPS for 4 tires. Haven't mounted them yet.

Yeah they're expensive. But if you're looking and can't find 'em it seems
Tirerack.com has them in their Nevada warehouse.

And they should be a nice replacement for my dry-rotted, bald with cord
showing, Michelin  MX maybe? or whatever 185R-14s from the dark ages.

Jeff
83.5 Westy
LA,CA