M3 CSL OE Wheels Specs:
 Front 8.5J x 19 ET44
 Front 9.5J x 19 ET27

RG4 CSL Replica Wheels: 
  9J x 19 ET37
 10J x 19 ET25

BBS CH Wheels: 
 CH017 10.0x19  (20) 5/120 ¢D84000 E39/E46M/E38 <REAR> $2800@
 CH004 8.5x 19  (35) 5/120 ¢D78000 E46                 $2600@
 CH016 8.5x 19  (20) 5/120 ¢D78000 E39

A Set: HKD$10,799
Wong Shan Tires