30mm 300zx brake clearance??

ok I got everything set, 30mm 300zx calipers, brake lines, 2x 5mm spacers, 2x 7mm spacers and all other parts and hardware. Why is it that I still have a problem with the 7 spoke stock rim touching the caliper?

Some info on my parts and car.
1991 240sx
cheap spacers (no studs or bolts)
stock 7 spoke rims

by the looks of it I think i would need at least 10 or 15 mm spacers.

Anyone else have the same problem??

Thanks for your help, much appreciated

i used a 25mm to clear my tear drops.

7 spokes will clear the 30mm calipers with a 5mm spacer!
I had 30mm calipers with 5mm spacers using my 7 spokes and they cleared.