I’m looking to out on some new shoes for the 66. I like the lowrod style so I’ve had my eye on some 22 inch foose wheels. All the research I’ve found shows that the bolt pattern is 5x120. I’ve measured and tried spacers and rims at that bolt pattern, my pattern is just a tad smaller.

I realize bigger rims are not everyone’s cup of tea but any experiences or photos of your 66 on larger rims I’d love to see/hear. The main challenge thus far is the hub on my car being too large a d can’t narrow down my bolt pattern.

 

Your cutlass has a factory lug pattern of 5 x 4-3/4" which is 5 x 120.7 mm in this case the .7 is important which is likely why you are having issues.

 

Just a thought, your factory brakes (whether drum or disc) are going to look extremely small inside those wheels.

 

@Loaded68W34 Thank you for that insight. Can you elaborate on that a little more. If I have spacers or a set of rims that say 5x120. I try to put them on. And the bolt pattern on my car is smaller than the 5x120 wouldn't the 5x120.7 make my pattern just slightly larger?

 

I would suggest that you need to brush up on your research skills. Nothing on a 1966 Oldsmobile is metric, so that should have been your first clue.
Every single RWD Cutlass built from 1964 to 1988 came from the factory with a 5 x 4.75" bolt circle.

 

Pics would help at this point.

 

No, they really wouldn't. The bolt pattern on the car is 5 x 4.75", period.
As for the OP's wheel spacer, anyone who can do math or plug numbers into a calculator knows that 4.75 x 25.4 = 120.65 mm. 4.75" is larger than 120 mm. I don't care what the spacer is stamped. If the bolt pattern on the spacer is larger than the one on the Olds, the spacer is stamped or machined incorrectly (which would be a real shock for a Chinesium wheel spacer).

 

You are correct, but many aftermarket wheel manufacture's list bolt patterns in metric only. Although 120.65 is the specific size (4.75*25.4 as you said) aftermarket companies sell wheels labeled as 5 x 120.7. Also correct that a wheel or spacer labeled 120 mm would be smaller than the stock bolt circle of 4.75, but without pics, there is no guarantee that the hubs/ axles are stock at this point. Wilwood, moser and others sell hubs and axles drilled for 4.5 and 4.75 to fit a wider variety of wheels so if any aftermarket components are on the car, there is no guarantee that it is still a stock bolt circle. Judging by the OP's original question, I assumed he is talking about a car that currently has stock wheels and suspension, but you know what the say about assumptions. Which is why I asked for pics.

 

@Loaded68W34 I'll try to get you some photos. I can say from the rough measurements I took the center of stud to stud, measuring the typical way you would for a 5 lug vehicle, the measurement is about 4 5/8. I also agree that when looking for aftermarket wheels or spacers, or on craigslist most people label the way I presented.

 

@joe_padavano Would brushing up on my research skills consist of reaching out to a group of individuals who likely have been around these vehicles their whole life? If you google what is the bolt pattern of a 1966 cutlass most things that come up say it is 5x120. I think what EVERYONE is missing is, the bolt pattern of 5x120 rims are LARGER than my bolt pattern for the cutlass. Given YOUR math above that would mean that my bolt patter is NOT the measurements you gave.

 

 

The 4.75" measurement is the diameter of the circle that passes through all five wheel studs. Since it is difficult to measure the diameter of an imaginary circle, you can get an APPROXIMATE idea of the bolt circle by measuring between two non-adjacent studs. And FYI, if you look at your photo in Post #11, that's 4 1/2 center-to-center, not 4 5/8.




And as for your research, I've owned over two dozen 1964-1972 Olds A-body cars, including nine currently. I got my first one in 1974. I'm guessing that was before you were born.

 

What YOU are missing is that it is NOT physically possible for the stock bolt pattern on your car to be less than 120mm. If your wheel spacer is larger, it is marked incorrectly. If you believe everything you see on the interwebs, I can't help you. But knock yourself out. I've wasted enough time here.

 

@joe_padavano So you're saying that multiple attempts with different products that display the same measurements are wrong? I've never modified the car. I can not guarantee that something has not been changed as @Loaded68W34 mentioned. But 100% multiple attempts with 5x120 were too big. If you don't believe me, to be honest, I don't care.

I do realize that my photo shows 4.5 not 4 5/8 It was a rough measurement while the tire was on the car. Again. Just another point for you to be an old scrooge that wants to argue for no reason.

 

Good luck.

 

Wow.

You acknowledge the measurement he pointed out, then bash him for pointing out it is not facrory spec.

Wow.

 

@Fun71 He didn't say it wasn't to factory spec. In fact, he was operating from the position they are. Do you have anything to contribute here, or are you just here to stir the pot?

 

My sentiment.

 

I agree with Joe. It will always be 4.75 and nothing different. Look at a different wheel that has standard specs. Lots of companies still show that.