stan1971

the 97 SS wheels i think are also a ZR1 style wheels, but i was wondering if they will fit my 95 without any mods ? and the tires that are on them are 275/40's ...is that too wide ? also would they throw off my speedo ? Thanks guys

blackbirdta

They will fit with no modification.

MysticTeal95Z28

275/40-17s are not too wide, will fit fine, and will not throw off your speedometer or odometer by much, if at all. I have 275/40-17s on my car. Here is a comparison for you:

Tire Size Comparison

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
245/50-16 4.8in 12.8in 25.6in 80.6in 786 0.0%
275/40-17 4.3in 12.8in 25.7in 80.6in 786 0.1%

This is what I used to find those specs:
http://www.miata.net/garage/tirecalc.html

Injuneer

You may require a modification. In late 96 model year, or early 97, GM corrected the mismatch between the front and rear axle hub diameters. Up to that point, the rear axle hubs on the 10-bolt rear that had been pirated from the S10 pickup were about 0.03" larger in diameter than the front hubs. So GM made the hub holes on the wheels larger (93-96) so they would fit over both the front and the rear hubs. In 97, when they made the rear hubs match the smaller front hubs, they also made the hub holes in the wheels smaller at well.

Test fit the wheels carefully. If there is any interference at all between the rear axle hubs and the hub holes in the wheels, the inside diameter of the wheel hub holes will need to by lightly sanded to open them up.

Some people assume its just a tight fit, and force the wheels over the hubs with an impact wrench.... serious mistake. Can lead to the wheels getting stuck on the hubs, or - worst case - cause the wheels to fracture.

This is covered in the street wheels and tires FAQ at the top of the page.

The speedo error will depend on which wheels were on your car when it left the factory. "Base" Z28's got 235/55-16 tires (26.1"). They only got the 245/50-16's if the car had the Z-rated tire option (RPO "QLZ")

stan1971

Thanks guys for the info...much appreciated.