> The best selection (and least expensive) 100 plus load rating tires
> seems to be in the 225/70 R15 size.  Will this work on a 2wd vanagon?  I
> am currently running 235/60R15 and they fit fine but are out of round
> due to a panic stop.  (Would have been wrecked van on the previous set
> of tires)
>

You ca calculate the theoretical diameter of any tire/wheels setup;
however, it's best to use a website like tirerack.com to get some specific
tire dimensions.

Your previous tires had a width of 23.5 cm with an aspect ratio of 60, so
the sidewall height was 23.5 * .6 = 14.1 cm which is (14.1 / 2.54) 5.6''
rounded.  (5.6 * 2) + 15'' = 26.2 in diameter of your previous set up.
Coincidentally, your new set up would be (22.5 *.7 / 2.54 *2) + 15 =
27.4'' in diameter.  This puts it awfully close to my tires which are
26.9'' in diameter (27x8.5 14 size).  Believe it or not, this larger
diameter corrects my spedometer error and makes little percievable
difference in the van's acceleration.

Keep in mind that actual diameter will vary and you should check the
actual manufacturer's specifications.

Chris S.
'85 Wolfsburg Westy "Camel"
http://www.knology.net/~vw/dadada.jpg