tireheight.com

245/45R16 in inches

A 245/45R16 tire is 24.7″ tall and 9.6″ wide, and fits a 16″ wheel. In inches it is written 24.7×9.6R16.

Diameter24.68″
Width9.65″
Sidewall4.34″
245/45R16 drawn to scale: 24.68 inch diameter, 4.34 inch sidewall, 16 inch wheel, 9.65 inch tread width16″ wheel4.34″24.68″ overall9.65″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 245/45R16 tires really are

Heights published by Toyo for all 4 tires in this size. Their published revolutions per mile work out to 23.9″ under load (below).

Real 245/45R16 tires measure 24.64–24.70″, against 24.68″ from the size code. Most run shorter than the size code (3 of 4).

Height under load23.9″

Published revs per mile (843) mean the tire rolls like a 23.9″ tire on the vehicle. Use this for speedometer calibration.

Weight spread22.5–25.0 lb

The lightest (Toyo Proxes R, SL) is 2.5 lb lighter per corner than the heaviest (Toyo Proxes RA1, SL).

4 tires in 245/45R16

Sort by the spec you care about.

LoadRevs/miSource
Toyo Proxes RPerformanceSL · 94W24.6522.53.61,477843Spec page
Toyo Proxes RRPerformanceSL24.6523.43.61,477843Spec page
Toyo Proxes R888RPerformanceSL · 94W24.6423.86.31,477843Spec page
Toyo Proxes RA1PerformanceSL24.7025.08.01,477843Spec page

Is 245/45R16 a 25-inch tire?

≈25″

Yes. The size code works out to 24.68″, and the 4 tires here publish 24.64–24.70″, so people call it a 25.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 245/45R16Difference
225/45R1623.97-0.71″-2.9%
185/55R1624.01-0.67″-2.7%
205/50R1624.07-0.61″-2.5%
195/55R1624.44-0.24″-1.0%
205/60R1524.69+0.00″+0.0%
185/60R1624.74+0.06″+0.2%
225/50R1624.86+0.18″+0.7%
205/55R1624.88+0.20″+0.8%
195/60R1625.21+0.53″+2.2%
215/55R1625.31+0.63″+2.6%

How to read 245/45R16

How to read any tire size

245/45R16 94W as printed on the tire sidewall, with each part numbered245/45R16 94W123456
How 245/45R16 94W is printed on the sidewall. It's the most common code among the 4 tires here (2 of them); tires in this size come in other load and speed ratings too.
1245Section width

245 mm across the widest point, or 9.65 inches. Every 245 size

245Aspect ratio

A percentage, not a measurement: the sidewall is 45% as tall as the tire is wide, which is 110.2 mm or 4.34 inches.

3RConstruction

Radial construction.

416Wheel diameter

Mounts on a 16-inch wheel. Approved wheel widths run 7.5″ to 9.0″.

594Load index

Each tire carries up to 1,477 lb (670 kg) at its maximum pressure.

6WSpeed rating

Rated for up to 168 mph sustained.

SpecificationInchesMetric
Overall diameter24.68627 mm
Section width9.65245 mm
Sidewall height4.34110.2 mm
Circumference77.51,969 mm
Revolutions per mile (calculated, unloaded)817.1508 per km
Revolutions per mile (published by manufacturers)843524 per km
Approved wheel width7.5–9.0191–229 mm

Speedometer error after switching to 245/45R16

Your actual speed– mph

Questions about 245/45R16

What is 245/45R16 in inches?

24.68 inches tall, 9.65 inches wide, on a 16-inch wheel. Written in inches, that is roughly 24.7×9.6R16.

How much does a 245/45R16 tire weigh?

Between 22.5 lb and 25.0 lb for the 4 tires listed here. The lightest is the Toyo Proxes R (SL); the heaviest is the Toyo Proxes RA1 (SL).

What wheel width do I need for 245/45R16?

Manufacturers approve 7.5–9.0″ wide wheels for this size.

How many revolutions per mile does a 245/45R16 make?

Published figures run 843 revolutions per mile. The calculated figure is 817.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 245/45R16 than 195/55R16?

0.24 inches taller on paper (24.68″ vs 24.44″), which raises the axle about 0.12″. Your speedometer will read about 1.0% slow.