245/45R19 tire size
A 245/45R19 tire stands 27.68 inches tall overall, on a 19-inch wheel, with a 110.3 mm sidewall and 245 mm of tread across. It turns roughly 729 times per mile.
- Overall diameter
- 27.68″
- 703.1 mm
- Sidewall height
- 110.3 mm
- 45% of 245 mm
- Circumference
- 87.0″
- 2,209 mm
- Revs per mile
- 729
- 453 per km
Reading the number
245 / 45 R 19 │ │ └─ rim diameter, 19 inches │ └──── aspect ratio, sidewall is 45% of width └──────── tread width, 245 mm sidewall = 245 × 0.45 = 110.25 mm diameter = (19 × 25.4) + (2 × 110.25) = 703.1 mm
Sizes that can replace 245/45R19
One rim step away, sorted by how close the rolling diameter stays.
Questions
›What does 245/45R19 mean?
245 is the tread width in millimetres. 45 is the aspect ratio, so the sidewall is 45% of 245 mm, or 110.3 mm. R means radial construction, and 19 is the wheel diameter in inches.
›How tall is a 245/45R19 tire?
27.68 inches, or 703.1 mm overall. That is the 19-inch rim plus a 110.3 mm sidewall at the top and another at the bottom.
›How many revolutions per mile does 245/45R19 do?
About 729 revolutions per mile, from a rolling circumference of 87 inches. Speedometers and odometers are calibrated against this figure, which is why changing size shifts both.
›What tires can replace 245/45R19?
Sizes within 3% of its rolling diameter and one rim step away, such as 255/40R19, 275/40R20, 245/45R18. Each is compared in full below.
Comparing against a size not listed? Open the calculator.