Reply to "Larger diameter wheels. Upgrading wheels and tires. Resizing wheels and tires. Modernizing wheels and tires. Campy clones, etc."

Thanks all for the suggestions.  11.0" is way too narrow for my purpose, pulls the sidewalls in too much and seems to be often used as a sort of a 'cheat' (for want of a better term) on a narrow bodied car (on my narrow GTS - I am sticking with 15" - PIRELLI CINTURATO) - this is not a narrow body, currently a factory GT5 - going to GT4.  Yes - the car currently has 345/35/15 as per factory GT5 (I wish someone made a 345 in suitable 17"), but I want to get away from the 15.0".  I have seen a 335/35/17 on a 14.0" - but in my opinion, too much of the rim was hanging outside the sidewall.  When I physically have the 335/35/17 in my hands (after the holiday break) - I will be experimenting, and expect at 'worst' - the rim will need to be 13.0" - at 'best' - I am expecting 13.5" - yes slightly narrower than what I 'dream' of - as being able to run a 14.0" - but the 14.0" seems just a tad too wide for the 335 carcass.  HA - by "...measure multiple times..." - I assume you mean -'measure ONE THOUSAND TIMES BEFORE CUTTING' - HA - for whatever cutting is required - I will be measuring multiple multiple times - leaving it - coming back the next day - measuring multiple multiple times again - and then doing what is required.  My biggest 'headache' - is figuring out a safe way to remove the factory bonded GT5 flares without causing any damage - they are genuine factory plastic parts and I prefer no remove them undamaged.  I also intend to run the car as low as I can - that may also cause me a few headaches - and is one reason that I may go from a 255/40/17 on the front to a 245/40/17 - but only time will tell.  HA - I have seen a 335 on 15.0" rim - but way too much stretch and only suitable for fad type events.  The BBS rims will be multiple piece, and hence  I can juggle the width of the hoops to create either the 13.0" or 13.5" (HA - and dream of a 14.0") - HA - following the old saying - "it is only money".