NO NO NO ... BUY A LARGER WHEEL !!!!!
If you buy a slightly larger wheel then you get to cheat your odometer, for every mile you drive it will only read .95 of a mile. or some figure like that.. If you buy a smaller wheel then you will be adding miles that you did not drive onto your odometer!!!!!
Here is a great link to calculate all your wheel size questions..
215/35/r18 don't even come close to rubbing on my 02 civic.. I'm getting 225/40/18's next time around !!
here's the link
http://www.2k1civic.com/stuff/tire_calc.cfmhttp://www.2k1civic.com/stuff/tire_calc.cfm