Jim -

Only use the stock belt width, which is 10mm.  And I only use Continental,
not Gates, Dayco or Goodyear - they tend to fudge their listings at 11mm
Widths.  Like Scott says, they tend to jump the WP pulley at high RPM.

http://www.airheadparts.com/viewDetail.asp?strMasterCat=&idproduct=8413
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
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On Fri, Aug 14, 2009 at 3:42 PM, Jim Felder <jim.felder@gmail.com> wrote:

> I'm replacing all the belts on my daughter's 2.1. I went to a FLAPS
> for WP belts for convenience, and find that they spec'd 11 mm wide
> belts for a vanagon. The alternator belt fits well in the alternator
> and crankshaft, but stands about 1 mm above the rim of the WP pulley.
>
> Is this OK or should I go back and get a 10mm?
>
> Jim
>