Re: 1989 Corvette Wheels
There are a few exceptions to Dave's explaination. In 1988 there was a one year only base wheel that was a 16". The 17" with the center cap like mine was more common. 1995 ZR1's, 1996 Grand Sports and Collectors Editions used a-molds. Sizes were mostly the only variation, with coupe, convertible, Z51, Z52 and ZR1 widths.
It is wrong to refer to something by pattern as a ZR1 wheel. It should be size, 17 x 9.5 and 17 x 11 that determines it. Grand Sport Coupes in 1996 were the only other car with an 11" rear wheel and the offset is different than the ZR1. It is the only wheel that is correct for our trucks, needing no spacer. ZR1's fit, but the rears are too far into the wheel well. The Grand Sports line up perfectly with the fronts.
