Hey Dubberz,

This will make sure your rolling diameter is the same/close enuf...

http://www.s-series.org/htm/calc/tiresizeconv.htm 

Anyone know what a 72 kombi standard tyre sizes are.

195R-14, I believe, which are a 78 or 80 profile I think.

Of course you can also use the tyre size calculator on Aussie Kombi Campers:

http://www.aussiekombicampers.com/projects_bbw.shtml

Actually,'72 kombi had 185 R 14 6 ply tyres.

Thanks for the info. My 225/50 x 16 come pretty close to the original tyre dia.