Offset on Wheels??

[Ikky's tvr]

Hi guys....Hope you well. Quick question on after market alloys on a chimaera 1999 400. WHats the offst on the front and back, ive been told its 35-45 all round but not 100% shore. any feedback will be appreciated if not don't worry guys. I've seen some good bbs replicas that will look good but are 16". So thinking of putting those on!!!