Is 5x100 bolt pattern the same as 5x4.5?

No, a 5x100 bolt pattern is not the same as a 5x4.5 bolt pattern. The first number, "5," refers to the number of bolt holes, while the second number indicates the distance between the bolt holes in inches or millimeters. Specifically, 5x100 has a distance of 100 mm, whereas 5x4.5 has a distance of 4.5 inches (approximately 114.3 mm). Therefore, they are not interchangeable.