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I posted this a few years back as a basic method of measuring the offset. http://forum.wscc.co.uk/forum/index.php/topic/80975-wheel-offset/?p=809176 (Actual excellent post from link above is shown here - Mod) I'll try to simplify this by using pictures in this example using a Mazda MX5 wheel. Begin by taking the wheel off and laying it face down on the garage floor. Lay a straight edge across the top and measure the distance from this to the floor (in this example it's about 190mm), divide this by 2 and it will give you a measurement for the centre of the wheel (190/2 = 95mm). Now repeat the process but this time measure the distance from the straight edge to the mounting face on the inside of the wheel (here that's about 140mm) Now take the result of the first calculation (95mm) and subtract this from the second measurement (140mm); so 140-95 = 45mm. So the offset of this MX5 wheel is 45mm. The PCD of the wheels (or Bolt Circle for our American cousin) is measured from centre to centre of opposite holes so here you can see that this mazda wheel is a 4-stud 100mm PCD.

And Mark had the cheek to question what I was watching on my TV.........

Hi Arthur, Looks like you're not that far away, quite a few of us in the local area now. Granted it's a bit further for you, but have you considered the Cotswold meet on Thursday? Should be a good one. http://forum.wscc.co.uk/forum/index.php/topic/105419-28th-november-cotswold-meeting-with-20-suppliers/

As above - doesn't need to be anything posh, but you would need the adaptor lead (http://www.tartybikes.co.uk/cameras/gopro_hero3_35mm_mic_adaptor/c551p12067.html) and accompanying hole in the side of your case! This is the mic I have... http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330955427676&ssPageName=ADME:L:OU:GB:3160 And this is the result it gives under the dash somewhere (slightly different on the Westy with it being so loud - will do a sample vid asap):