Actually you do need some precision. Almost all tire balancers rely on the
center bore to center and mount the rims for balancing. Especially the
inside.
It takes a fairly large lathe or a milling machine with turn table to handle
15" wheels. Considering the liability and all this is not a bad deal. Using
Audi wheels you may need spacers and longer studs/bolts. Also keep in mind
that on the Audi the center bore is used as part of the support or mounting
package. Not to start a new wheel tread but it wouldn't be me.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of C
B
Sent: Monday, February 01, 2010 1:56 PM
To: vanagon@GERRY.VANAGON.COM
Subject: PDX Machine Shop Recommendation?

Gotta enlarge the centerbores to fit the front grease caps on Cunegonde's
new Audi rims. Before we mount the new Geolandar tires. The only quote I
could find was over $40/rim! I don't need precision, I just need the
centerbores enlarged about 7mm. What is the list wisdom?