i'm sure they aren't genuine cos cup 2's are 17's as far as i know and if they were i'd want more for them but i'm pretty sure they were made for and therefore will have the correct offset for a 911
. 964 i'd imagine ? rears are 265 not 255 and the offset is, as you would expect stamped on the inside . what it is i dont know because i havent got the time to take them off this min but its going to be whatever its supposed to be for a 911 of around the year that the 911's that came with cup 2's . they were bought off someone on here from somewhere on the a1 with a white pre 964 11 who annoyingly i cant remember the name of lol . they fit on my 944 fine and are as straight ..... or round as they come and if it wasnt for the fact that the cars in no fit state to spin them i'd never get rid but at the min 4 bricks and cash are of more use.