Are wheels on a 1990 Z24 14 inch or another size?

check the plackrd on the inside of the driver's door hinge when you open the door, otherwise i am pretty sure they are 15 inch. At least all the z24's I knwo were. speciffically the rim was a 15x6. Hope this helps. I believe the tire size is 205/60/15. Someone might have put on 14 in rims, but they should be 15. Otherwise to see whats on there, read the tire size on the sidewall of the tire. If their 14, they are probally 195/70/14. If it were me I'd do the 15 inch. better handleing. On my '88 they stock Z rims 14" ok 90 had 14s with 215/60r14 if u put 195/70r14 on it a more bumpyer ride and u loose all of the handling with the fe3 suspison the 15s were used 93 maybe 94 and up but ur best bet is to do 16s with 205/55r16 its a bigger tire u will have to roll the fender and quarters but better handling and smoth ride