225/45R17 tire size
A 225/45R17 tire stands 24.97 inches tall overall, on a 17-inch wheel, with a 101.3 mm sidewall and 225 mm of tread across. It turns roughly 808 times per mile.
- Overall diameter
- 24.97″
- 634.3 mm
- Sidewall height
- 101.3 mm
- 45% of 225 mm
- Circumference
- 78.5″
- 1,993 mm
- Revs per mile
- 808
- 502 per km
Reading the number
225 / 45 R 17 │ │ └─ rim diameter, 17 inches │ └──── aspect ratio, sidewall is 45% of width └──────── tread width, 225 mm sidewall = 225 × 0.45 = 101.25 mm diameter = (17 × 25.4) + (2 × 101.25) = 634.3 mm
Sizes that can replace 225/45R17
One rim step away, sorted by how close the rolling diameter stays.
Questions
›What does 225/45R17 mean?
225 is the tread width in millimetres. 45 is the aspect ratio, so the sidewall is 45% of 225 mm, or 101.3 mm. R means radial construction, and 17 is the wheel diameter in inches.
›How tall is a 225/45R17 tire?
24.97 inches, or 634.3 mm overall. That is the 17-inch rim plus a 101.3 mm sidewall at the top and another at the bottom.
›How many revolutions per mile does 225/45R17 do?
About 808 revolutions per mile, from a rolling circumference of 78.5 inches. Speedometers and odometers are calibrated against this figure, which is why changing size shifts both.
›What tires can replace 225/45R17?
Sizes within 3% of its rolling diameter and one rim step away, such as 205/55R16, 225/40R18, 235/40R18. Each is compared in full below.
Comparing against a size not listed? Open the calculator.