biggest 5-lug that will fit under 15" wheels? (did a search already) 1990 240sx

[Black R]

I know for a fact that front rotor in this size82mm (11.1in)x 23mm will fit under 15" wheels.

I've done it before on another car.

But I'm wondering what oem nissan rotors and calipers will fit under say a 15x8 +27 wheel...

5-lug of course..... for an s13 coupe...

[cdlong]

caliper clearance has little to do with offset and width.

generally wheel diameter can be calculated by adding 4" to the rotor diameter. so you can run about an 11" rotor under 15"s, which you already know.

with that said, the answer to your question is probably 11" (280mm) z32 rotors. if the 4 piston calipers don't clear, q45 calipers use the same size rotor and give a lot more clearance.

[nismofly]

depending on the spoke design, you might be able to fit 26mm z32 brakes