I am currently restoring a 1969 Pontiac Catalina, and I ran into a slight issue on the topic of wheels. I'm not familiar with wheel sizing but I know a 1969 Bonneville and a Catalina have the same dimensions for the most part. If anyone has any tips or answers for me that'd be great.

Hi Caden. What's your issue regarding wheels for a '69 Bonneville / Catalina? Are you looking for the size, bolt pattern, offset? Please elaborate on what you are looking for help on.

5x5 bolt pattern, 18 in diameter. I just don't know if i can fit 8s on the back

17 hours ago, Caden Brown said:

5x5 bolt pattern, 18 in diameter. I just don't know if i can fit 8s on the back

Two ways to find out.

1. Take your car to a reputable wheel and tire shop like Discount or Belle Tire (mid-west area) and have them measure your wheel wells. Most shops will do this for free or for a small fee.

2. Measure it yourself with the Percy WheelRite Wheel and TIre tool. It's under $70 from Summit Racing.

https://www.summitracing.com/parts/php-01201

It will allow you to measure for wheel diameter, wheel width, backspacing, and tire profile. You to simulate a number of different sized wheels and tires without actually having them. I own myself. It's money well spent.