Installed a set of four 17"wheels/tires today and they fit fine. Used 17 x 7.5"W Sport wheels 35mm offset. Goodyear Eagle 1 225 x 45 x 17 in back and 205 45 x17 front. A friend of mine installed 18" and had problems with the tires hitting the wheel wells in front but his car was lowered 1" . Not sure about 18" size wheels but if Raydar says that they fit he probably uses a specific formula.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
Originally posted by Dennis LaGrua: ... Not sure about 18" size wheels but if Raydar says that they fit he probably uses a specific formula.
No specific Formula. Just that 35mm seems to be the ideal offset for pre 88 Fieros, as long as the widths aren't absurd. With a 225 section width, the shoulders of the tire are going to be in the same place on a 7" wheel as they will on an 8" wheel.
I have 17x7" wheels with 40mm offset on my '87 SE. They fit fine.
What is the section width of your rear tire? How close are you to the springs/struts/perches? 40mm is close. It may depend on tire fitment whether it will rub or not.
