265/45R16 tire size in inches

A 265/45R16 tire measures

25.4" tall × 10.4" wide

4.69" sidewall on a 16" wheel. 794 revolutions per mile.

265/45R16 means a tire 265 mm wide, with sidewalls 45% as tall as the tire is wide (119 mm), radial construction (R), for a 16 inch wheel.

25.4"16" rim4.7"10.4" wide
265/45R16: 25.4 inches tall, 10.4 inches wide, on a 16 inch rim, drawn to scale

265/45R16 specs

Overall diameter (height)25.39 inches (645 mm)
Section width10.43 inches (265 mm)
Sidewall height4.69 inches (119 mm)
Wheel (rim) diameter16 inches
Circumference79.8 inches (2,026 mm)
Revolutions per mile794
Revolutions per kilometer494
Approximate rim width8.5" to 10.0"
In inches (flotation style)25.4x10.4R16
Aspect ratio45%

Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.

Sizes that can replace 265/45R16 on a 16" wheel

These 16" sizes are within 3% of 265/45R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
185/65R1625.47"7.28"+0.3%60.2 mphCompare
215/55R1625.31"8.46"−0.3%59.8 mphCompare
295/40R1625.29"11.61"−0.4%59.8 mphCompare
235/50R1625.25"9.25"−0.5%59.7 mphCompare
195/60R1625.21"7.68"−0.7%59.6 mphCompare
175/70R1625.65"6.89"+1.0%60.6 mphCompare
245/50R1625.65"9.65"+1.0%60.6 mphCompare
205/60R1625.69"8.07"+1.2%60.7 mphCompare
225/55R1625.74"8.86"+1.4%60.8 mphCompare
255/45R1625.04"10.04"−1.4%59.2 mphCompare
275/45R1625.74"10.83"+1.4%60.8 mphCompare
285/40R1624.98"11.22"−1.6%59.0 mphCompare

Same height on other wheel sizes (plus and minus sizing)

SizeWheelDiameterDifference
165/80R1515"25.39"0.0%Compare
185/85R1313"25.38"0.0%Compare
325/25R1919"25.40"0.0%Compare
225/70R1313"25.40"0.0%Compare
235/40R1818"25.40"0.0%Compare
305/35R1717"25.41"+0.1%Compare
275/25R2020"25.41"+0.1%Compare
225/25R2121"25.43"+0.2%Compare
265/50R1515"25.43"+0.2%Compare
265/40R1717"25.35"−0.2%Compare
175/75R1515"25.33"−0.2%Compare
195/55R1717"25.44"+0.2%Compare

One size up or down

Compare 265/45R16 with another size

With 275/45R16 tires, when your speedometer says 60 mph you are really going

60.8 mph

275/45R16 is +0.35 inches (+1.4%) in overall diameter. That is within the 3% most shops and makers allow.

265/45R16275/45R16Difference%
Overall diameter25.39"25.74"+0.35"+1.4%
Section width10.43"10.83"+0.39"+3.8%
Sidewall height4.69"4.87"+0.18"+3.8%
Circumference79.76"80.88"+1.11"+1.4%
Revolutions per mile794.3783.4−10.9−1.4%

Questions

How tall is a 265/45R16 tire?
A 265/45R16 tire is 25.4 inches tall (645 mm), calculated from the size. It is 10.4 inches wide with 4.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 265/45R16 mean?
265/45R16 means a tire 265 mm wide, with sidewalls 45% as tall as the tire is wide (119 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 265/45R16 tire make?
About 794 revolutions per mile, based on a circumference of 79.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 265/45R16 tire?
Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 185/65R16 instead of 265/45R16?
185/65R16 is +0.08 inches (+0.3%) in overall diameter, so at an indicated 60 mph you would be doing 60.2 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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