rim and tyre size?

[oldeskewltoy]

RIM diameter has NOTHING to do with "performance"... TIRE diameter DOES has something to do with "performance"

16" is fine as long as offset correct and TOTAL diameter is close to original 590mm (23.2"). For example original tires on 86/87 GTS were 195/60/14, you could use a 195/45/16 (2 tires I know of...) this would be close, but slightly undersized... OR 205/45/16(a dozen tires available) would be almost an EXACT match 591mm as opposed to 590mm. So you could use a 16" wheel and still keep total diameter what it was originally.

more rim DOESN'T necessarily add mass... many rims are lighter then tires... so the wider the rim diameter the less tire... so could very well be LIGHTER!!

Bigger issue is getting the right offset. I have the 15" mkII Supra wheels... 15 x 6 with -8 offset. I wanted the Supras... and the 15" is VERY rare....

Biggest problem with 16" rubber... $$$$$$$ waaay more pricey for 16" over 15.

Just make sure the 16" rim you want comes in the offset you need!!! Don't be sold on, "it'll fit" Nice rims on the wrong car looks STUPID... no matter what your intentions....