I was going to buy a set of spare v-belts to carry around in my '87
Vanagon, but when I compared the specs in my owners manual with the
items on the Bus Depot site I found the following:

A/C belt, VW=12.5x1153      BD=13x1160
Alt belt, VW=9.5x1100       BD=10x1100
P/S belt, VW=9.5x1080       BD=10x1080

Should I be concerned about the size discrepancy? The Bus Depot belts
are described as "Continental" belts.
The VW owners manual does stress to use only VW belts, but I would
expect that. Can spare belts be gotten at any FLAPS, or are the German
ones any better.