Hi guys, Been searching the forums but haven't quite found the answer to my question, any help and experiences is much appreciated. Of course like lots of us I want to push the limits of the wheels :D , I'm not looking for the biggest wheels but lowest possible offset for stance whilst staying flush with the fender. Car: 2008 ZR6 Wheel setup I'm looking at: 19 x 8.5inch with +30 offset Coilovers will be used and yes will want to lower as much as possible I guess my first question is: On concave wheels, does lowering the offset mean that the spokes are pulled inwards on a sharper angle or do they stay the same. Do I need wider rims to create the angle instead? This was posted to me: http://www.customwheeloffset.com/wheel-offset-gallery/241/wheel-offset-2009-toyota-camry-flush-dropped-1-3%22-custom-rims These are 19 x 9.5inch wheels with +40 offset Could someone confirm that by me saving 25mm in width of the wheel, means I can add +10mm to offset. I figure that the extra inch is split in two (12.5mm) and placed on either side of the rim, so I should be 2.5mm under this. Thanks again for your help everyone. Alex