BMW M3(E46) wheel sizes

Year	Wheel size	Offset	Bolt pattern	Tire size
BMW M3(E46) 3,2L
2003	18x8.0	26		225/45R18 front
	18x8.0	26		225/45R18 front
	18x8.0	47		255/40R18 rear
2004	18x8.0	26		225/45R18 front
	18x8.0	26		225/45R18 front
	18x8.0	47		255/40R18 rear
2005	18x8.0	26		225/45R18 front
	18x8.0	26		225/45R18 front
	18x8.0	47		255/40R18 rear
2006	18x8.0	26		225/45R18 front
	18x8.0	26		225/45R18 front
	18x8.0	47		255/40R18 rear
2007	18x8.0	26		225/45R18 front
2007	18x8.0	47		255/40R18 rear

Tire size 18 to 18, width 225 to 255 and tire aspect 40 to 45.
Smallest tire size: 225/45R18, Largest: 255/40R18.