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Frequently Asked Questions
The numbers in “225/40R18” constitute the tire’s dimensions. “225” is the width in millimeters, “40” is the aspect ratio (the height of the sidewall as a percentage of the width), “R” means it’s a radial tire, and “18” is the diameter of the wheel in inches.
The cost of 225/40R18 tires can vary widely depending on the brand and type. While the cost can vary from around $62 to over $186 per tire.
Rims that are in the shape 225/40R18 tires are typically 18 inches in diameter and might range from 7.5 to 9 inches in width.
Both tire sizes have an identical width of 225 mm. Indeed, the distinction is within the sidewall height; 225/40R18 tires have a taller sidewall than 225/35R18 tires, making the latter appear much less huge.
