What is the radial tire size for 1948 Buick Roadmaster?

The original tire size for a 1948 Buick Roadmaster is typically 8.00-15. However, if you're looking for a radial tire conversion, a common equivalent size is 215/75R15. It's important to ensure that the new tires fit properly and are compatible with the vehicle's specifications. Always consult with a tire professional for the best options.