88 Fiero GT wheels (Page 1/1) Duck 1 JUN 03, 09:24 AM What is the difference between a Pontiac gold Transam wheel and a 88 Fiero GT wheel ? reinhart JUN 03, 10:44 AM The Trans Am wheels are 16" I believe. Fiero is 15" IMSA GT JUN 03, 10:48 AM Offsets are wrong and bolt pattern is different. Duck 1 JUN 03, 11:42 AM Thanks for that information. Mickey_Moose JUN 08, 10:58 AM quote Originally posted by IMSA GT: Offsets are wrong and bolt pattern is different. This. Fiero bolt pattern 5x100 vs T/A 5x115, so they won't fit (so the offset really doesn't come into play, even though it is different)