Many, many times we Volk's have reported strange noises and asked what
they meant - hoping to head off disasters. Well, it's my turn, it would
seem.

Imagine if you will, you are on a bicycle, and you have attached a
rectangular piece of card board to the front wheel fork so that the edge
of the card board sticks out just far enough in to the plane of the
rotating wheel that the card board strikes every spoke as it passes by.
At slow speed its an innocuous  put-put-put-put, but as the wheel speeds
up the tempo changes to a distinct whir like a small motor. We all did
this as kids. Right? Well, I've got the whir without the cardboard - in
my Vanagon.

This whir sounds just like that cardboard but it begins to become
noticeable around 50 mph - gets louder with more speed and disappears in
road noise around 65 mph.

I am concerned! There is no vibration associated with it. I am wondering
if some bearing issue is developing - or other.

Anyone care to speculate?

Thanks,

John