I found the Girling website: http://www.girlingauto.com/en/index.aspx
I looked through their catalog and found brakes for a POLO, (there were no Rabbits in the list): 6015003 Brake Disc 0 Fitting Position: Front Axle Brake Disc Type: Full, Ø: 239 mm, Br. Disc Thickness: 8 mm, Min. thickness: 7 mm, Num. of holes: 4 This is the first entry on the page. The information is all metric. Maybe they did things in inches in the '70s, but Girling is metric now. So I sure if you bought a replacement the part would be metric. Jerry ________________________________ From: Brian J White <br...@bjwhite.net> To: U.S. Metric Association <usma@colostate.edu> Sent: Saturday, March 14, 2009 2:39:46 PM Subject: [USMA:43842] Re: Tyre (tire) sizes 3..I once had a Canadian spec VW Rabbit - 1979 and made in Germany. The front disc brake rotor had stamped on it its diameter in inches. Now it could be because this part could have been made in the UK or even the US, but unlikely. I wouldn't think that was unlikely. It was probably made by Girling in the UK. Girlings have been common for decades on Volkswagens and Audis. My Peugeot 405 Mi16 also had Girlings on it.