I'm trying to find the size of my wheels as I think the tyres that are on them at the moment are too small. The Wheels are Enkei 17" BNR33 Racing Model. The tyres fitted are 235 45 17. I recon I should have at least 245's on. However to find out I need to know the with of the wheel. Measuring from the inside edge tothe inside of the spokes is 7.5", from theinside edge to the outer enge is over 10" any ideas what size they are then?