i know this is not really related to suspension (sorry) but i dont know where else to post it but what i need to know is what sizes where the iroc wheels

 

Do a search..

They were all 16x8 4.75 bolt pattern and I forget what the BS is off the top of my head.

Kat

 

Offsets are: 0mm, 16mm, and 20mm. The 0 and 20mm are from wheels I have, the 16mm is from someone else here on the boards. The offset is in the direction that moves the wheel inboard.

RBob.

 

Rbob- any more details there? I’ve always known about the 0 offset fronts and the 16mm offset rears, but was surprised to find that my formula’s rears are offset about 20 mm (went right out and measured a set of TA/GTA mesh rears and got 16mm)

 

It is actually cast into the back side of a spoke on the wheels. Not sure what year they are but it is the single stripe design.

RBob.

 

If you consider any wheel that came on an IROC and IROC wheel....in 88 and 89 IROC's also came with 15x7's. 88's look like the regular Z28 15x7 fully painted with an IROC center cap. 89's had a 15x7 that looked like the 16x8.