Tire Rack has them. There are a lot of Volkswagen owners (86) that have reviewed them. On about the third page of reviews (filtered to only show VW owners), I found a 2000 NBC owner that posted a good report. I tried to link directly to the page of reviews I was looking at, but TR just takes me to a main review page. You'll have to find the tire, then drill down by make to get to the review for the Beetle. The overall rating was a 9.3 with 5000 miles on the tires.
We have these wheels on our 2014 Beetle conv. I want to take the hub cap part off and run spokes but want to cover up the center area and lugs. I would even put chrome lugs if a center vw cap filled the center.
Just bought a 2006 2.5L NB. One of the center VW logo caps is missing. See different sizes on ebay 55mm, 56mm. Mine measure 56mm measured on the outside. Do they screw in, snap in? The recess in mine looks rather 'boogered up'. Bill