Depends on what tire width you are running too. If you have an 8 or 7.5" wide rim then get a 225 or 235 width and 45 sidewall.

I am running 215/55ZR16 on a 16x7 rim. Lowered on Eibach ProKits and do not have much problem - but it is usually only me in the front and my emergency tools in the hatch.

use the following to compare current tire with possible solutions.

http://www.1010tires.com/tiresizecalculator.asp

http://www.miata.net/garage/tirecalc.html

http://www.discounttiredirect.com/di...foTireMath.jsp

Just google man. These are common tools.