Frequently Asked Questions
A 225/55R19 tire, when properly mounted and inflated on a 19-inch wheel, measures around 26.5 inches in overall diameter. The tread width is 8.9 inches and the sidewall height is 6.3 inches from rim to tread. The overall circumference of the tire is roughly 83 inches.
Rotating 225/55R19 tires every 5,000–8,000 miles is recommended to ensure that the tread wears down evenly across all four. We always recommend looking at your owner’s manual as the intervals for rotation depend on several factors, including driving habits, vehicle type/weight and wheel alignment.
225 refers to the width of the tire tread in millimeters. 55 is the aspect ratio where the number indicates the height of the sidewall as a proportion of the tread width. R stands for a radial, and 19 is the wheel diameter in inches.
Normally, a 225/55R19 tire needs between 30 - 35 PSI, measured cold before driving. However, the best air pressure level can differ for various models, that’s why you should always check your vehicle’s recommended air pressure in the owner’s manual.
This tire size has a width of 225 millimeters and an aspect ratio of 55%, which means that the height of the sideboard in millimeters will be 55% of the 225-meter tread.
