225/40R16 Tire Size Specifications & Compatible Vehicles
Overall Diameter
586.4 mm
Section Width
225 mm
Sidewall Height
90.0 mm
Circumference
1842.2 mm
Revs/Mile
874
Rim Diameter
16"
Inch Equivalent
23.1x8.9R16
Rim Width (ETRTO)
6.5" – 8.5"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 225/40R16 and may be used as replacements:
Understanding 225/40R16
The tire size 225/40R16 means the tire has a section width of 225mm, an aspect ratio of 40% (the sidewall height is 40% of the width), and fits a 16-inch rim.
Sidewall Height = 225 x 0.4 = 90.0 mm
Overall Diameter = (90.0 x 2) + (16 x 25.4) = 586.4 mm
Circumference = 586.4 x π = 1842.2 mm
Overall Diameter = (90.0 x 2) + (16 x 25.4) = 586.4 mm
Circumference = 586.4 x π = 1842.2 mm
Frequently Asked Questions
The 225/40R16 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 225/40R16 tire has an overall diameter of 586.4mm (23.1 inches). The sidewall height is 90.0mm, and the total circumference is 1842mm.
For 225/40R16 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 225/40R16 586.4mm diameter. Compatible alternatives include 165/70R14, 215/30R18, 185/35R18. Use our Tire Size Calculator to compare any two sizes.