I bought a set of these rims, thanks Chris!

A stock 185R14 has a rolling circumference of about 1980mm.

A 215/60R16 has a rolling circumference of ~2020mm, about a 2%
difference.

A 205/60R16 is ~2000mm, ~1% difference.

 From reading, a 215/60R16 might be tight for clearance. I'd really
like to hear from anyone running either of the above sizes on a
16x7ET37 wheel on a 2WD Vanagon (many of the discussions on theSamba
are oriented around the Syncro). I went looking for all season
205/60R16 with a suitable load rating (96 or higher).

Kumho ECSTA LX 205/60R16 96V BSW, UTQR of 600-a-a, about $85 each was
the best price I could find (plus shipping). Kumho also makes a Kumho
ECSTA DX 205/60R16 96V, which is lavender scented (!).

For a 215/60R16, a good choice might be the Falken Ziex ZE-912
215/60r16 99h @~$60 each.