Would these wheels fit?

[Trans am Man]

Hi guys,does anybody know if these wheels will fit my 96trans am?They are currently on a 86 corvette,they are 18in rondell wheels with 275 35 18 tyres on them,been offered them cheap,but no good if they dont fit!!

Any help would be great!

[Mark B]

Im assuming they are 18" x 9" from the tire size? Do you know the back spacing or offset?

I cant tell you for sure with out the backspacing or offset, but just guessing from that lip, I am going to say no. They will stick out too far.

[SOMSS]

They will fit!

[Trans am Man]

They will fit!

How can you tell?I dont know the backspacing etc,but they are 18x8.5 at the front,and 18x10 at the rear,and that they are made by rondell!

[Trans am Man]

Ok,the offset is 13 for the front and 19 for the rear,with a 74.1 bore,heres the official info,they are 18x8.5 front,and 18x10 rear,


inch width pcd bore offset
18 8.5 5X120 74.1 Silver / HP Silver 13

18 10.0 5X120 74.1 Silver / HP Silver 19

[Injuneer]

Ok,the offset is 13 for the front and 19 for the rear,with a 74.1 bore,heres the official info,they are 18x8.5 front,and 18x10 rear,

inch width pcd bore offset
18 8.5 5X120 74.1 Silver / HP Silver 13

18 10.0 5X120 74.1 Silver / HP Silver 19

A really bad mismatch. The bolt circle is for a BMW.... 120mm. The 3rd and 4th Gen wheels, and the C4/5/6 Corvettes are 120.65mm (4.75"). If they've been bolted on the 'vette for a while, the conical lugs have probably deformed the holes to the point where they will stay seated. Putting the wrong bolt circle on the studs, even if its a minor mismatch, stresses the studs by putting them in bending. I've seen first-hand reports of people who have had the lugs loosen up using 120mm wheels. I've also had an endless number of people post and say it makes no differences at all, since they have successfully bolted BMW wheels on their F-Bodys. Speaking as a licensed mechanical engineer, I don't recommend it.

The center bore on the rear wheels will probably need to be ground or sanded to a slightly larger diameter. The 93-late 96 F-Body's had a larger diameter hub on the rear axles, and usually you end up opening the hole in the wheels up a bit so they will fit.

Then there's the offset.... wayyyy to small. The stock 8" wide wheels on a 4th Gen have a 55mm offset, the stock 9" wide wheels used on the WS6/SS models are 50mm offset.

With a 13mm offset on the front wheels, 8.5" wide, the wheels will stick out about 4.20" from the face of the mounting hub. That means they will stick out about 2" farther then your stock wheels. For an 8.5" wide wheel, you need at least a 30mm offset (3.5" frontspace), and even that sticks out too far for my taste. The farther the tires stick out, the more the road gravel is going to sandblast the bottom of the doors and the rear quarter panels.

In the back, with a 19mm offset on a 10.0" wide wheel, the wheels will stick out about 4.72". That's 2.5" more than the stock wheels, and will definitely put the outer edges of the tire about 3/4" outside the fender. My 17x11 50mm offset ZR1's have a 4.00" "frontspace", and are jut barely under the fender looking straight down from above. When you look straight down with those wheels, you will see 3/4" of tire sticking out of the fender. The wide lip on those wheels looks great, but its wide because they are the wrong offset for your car. That's why Mark B. said he didnt't think they would fit. Not sure what SOMSS based his statement on.

[Trans am Man]

Well thats a pretty definate answer,many thanks,so alloys off a c5 vette will fit then?

[Injuneer]

Well thats a pretty definate answer,many thanks,so alloys off a c5 vette will fit then?

Depends on the width and offset. A lot of the C5 and C6 wheels have larger offsets, some as large as 79mm. That increases the backspace to a point where they won't fit without spacers.