rim size for 2001 malibu???

does anyone know the maximum rim size for a 2001 malibu (ive heard 18x7.5 and 17x7)...please tell me the lug/bolt pattern and size as well...thanks

i have 20 inch 200 bar spokes on my malibu cant really remember the lug/bolt pattern i let hpracing do all the work but i do know i have wheel spacers keep my shii from rubbing