MK3 tire/wheel sizing reference

[supra90turbo]

Stock wheel sizes:
91+ 5spokes: 16x7, +44mm - 16lb/ea
sawblades: 16x7, +37mm - 23lb/ea

Put in the "old" values and the proposed new values here:
http://www.1010tires.com/WheelOffsetCalculator.asp

and for tires, use
http://www.miata.net/garage/tirecalc.html

if that doesn't work, use:
http://www.miata.net/garage/tirecalcold.html

don't forget the stock size is 225/50r16

 

[KeithH]

1998 MkIV Twin-Turbo Supra Wheels Info

93 - 97 TT 5-spokes: 17x8(f) 17x9.5(r), +50mm - 24.75(f)lb/26.55(r)lb
98 TT 5-spokes: 17x8(f) 17x9.5(r), +50mm - 23.6(f)lb/25.4(r)lb

Stock tire sizes:
235/45ZR-17(f)
255/40ZR-17(r)

* Running the stock MkIV TT tire/rim combination will put your speedometer off by 0.7%. When your speedo reads 60 mph you will actually be traveling 60.4mph

You could technically run a 20x9.5 rim with a 255/25/20 tire (if you could find one in that size) in the rear and it would match the MkIV rim/tire numbers perfectly