Quote:
Originally posted by mikeinsanmarcos
acceleration wise you will not be able to tell much difference... As for rubbing, your overall diameter should not change if you size your tires properly, you will just use less rubber on the larger rims they will be effectively the same size... less sidewall (18" rims) will give you a stiffer ride but the sacrafice is you will feel every little bump that much more...
Rubbing is more a function of width rather than diameter.
As for the choice in diameter, consider your tyre choice in 18" - is there the same level of choice? We (say 3 years ago) slapped a set of 18" wheels on a WRX, and were disappointed with the choice of tyres available - it was probably cause 18"s weren't all that common back then.
Do some work in photoshop. What will the 18" wheel and tyre package look like on your car? Too big? OK? At the end of the day, it's your choice, but there can be a huge difference in that tiny little measurement.
Show us the photoshop work!!
C!