They are Compomotive Old Skool Flat Face 5 Spokes ET33 standard, when I put my winter wheels on the 8 x 17 Speedlines I had to run a 16mm spacer to clear the front brakes I put them all round to make it look ok.
When I changed back to the MO's I left the spacers on to see how it looked, I thought it looked mint so left them on no other reason than aesthetics.

Here's a quick couple of photo's taken in the garage sorry for the poor quality it's dark out lol





And one side on



You are probably maxxed out at the front with ET17 you might go to ET15 the rears could probably go another 10mm.

Rich