For Audi a4 b8
2 types of oem wheel i know are:
1) 8jx18 et47 5x112 central bore 66.6 with 245/40/R18 tyres
offset (et) is 47
2) 7jx16 et39 5x112 central bore 66.6 with 205/60/R16 tyres
offset (et) is 39
5x112 mm
The 2012 Audi A4 has a 9 ft. 2.6 in. (110.6 in.) wheel base.
The 2010 Audi A4 has a 9 ft. 2.6 in. (110.6 in.) wheel base.
The 2007 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.
The 2008 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.
The 2009 Audi A4 has a 9 ft. 2.6 in. (110.6 in.) wheel base.
The 2013 Audi A4 has a 9 ft. 2.6 in. (110.6 in.) wheel base.
The 2001 Audi A4 has a 8 ft. 7 in. (103 in.) wheel base.
The 2002 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.
The 2003 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.
The 2006 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.
The 2004 Audi A4 has a 8 ft. 8.3 in. (104.3 in.) wheel base.