225/50R18 Tire Size Specifications & Compatible Vehicles
Overall Diameter
682.2 mm
Section Width
225 mm
Sidewall Height
112.5 mm
Circumference
2143.2 mm
Revs/Mile
751
Rim Diameter
18"
Inch Equivalent
26.9x8.9R18
Rim Width (ETRTO)
6.5" – 8.5"
Compatible Vehicles
The following vehicles use 225/50R18 tires from the factory:
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 225/50R18 and may be used as replacements:
Popular Comparisons
See how 225/50R18 compares to other common tire sizes:
Understanding 225/50R18
The tire size 225/50R18 means the tire has a section width of 225mm, an aspect ratio of 50% (the sidewall height is 50% of the width), and fits a 18-inch rim.
Sidewall Height = 225 x 0.5 = 112.5 mm
Overall Diameter = (112.5 x 2) + (18 x 25.4) = 682.2 mm
Circumference = 682.2 x π = 2143.2 mm
Overall Diameter = (112.5 x 2) + (18 x 25.4) = 682.2 mm
Circumference = 682.2 x π = 2143.2 mm
Frequently Asked Questions
The 225/50R18 tire size is used on 4 vehicle trims including the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, 2023 Toyota Corolla Cross and 1 more.
A 225/50R18 tire has an overall diameter of 682.2mm (26.9 inches). The sidewall height is 112.5mm, and the total circumference is 2143mm.
For 225/50R18 tires, the ETRTO recommended rim width is 7.5". The acceptable range is 6.5" minimum to 8.5" maximum. Using a rim outside this range can cause improper bead seating and unsafe handling.
Yes, as long as the replacement tire overall diameter is within 3% of the 225/50R18 682.2mm diameter. Compatible alternatives include 285/35R19, 345/40R16, 205/55R18. Use our Tire Size Calculator to compare any two sizes.