285/65R15 tire size in inches

A 285/65R15 tire measures

29.6" tall × 11.2" wide

7.29" sidewall on a 15" wheel. 682 revolutions per mile.

285/65R15 means a tire 285 mm wide, with sidewalls 65% as tall as the tire is wide (185 mm), radial construction (R), for a 15 inch wheel.

29.6"15" rim7.3"11.2" wide
285/65R15: 29.6 inches tall, 11.2 inches wide, on a 15 inch rim, drawn to scale

285/65R15 specs

Overall diameter (height)29.59 inches (752 mm)
Section width11.22 inches (285 mm)
Sidewall height7.29 inches (185 mm)
Wheel (rim) diameter15 inches
Circumference92.9 inches (2,361 mm)
Revolutions per mile682
Revolutions per kilometer424
Approximate rim width7.5" to 9.0"
In inches (flotation style)29.6x11.2R15
Aspect ratio65%

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 285/65R15 on a 15" wheel

These 15" sizes are within 3% of 285/65R15's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
265/70R1529.61"10.43"+0.1%60.0 mphCompare
245/75R1529.47"9.65"−0.4%59.8 mphCompare
215/85R1529.39"8.46"−0.7%59.6 mphCompare
235/80R1529.80"9.25"+0.7%60.4 mphCompare
225/80R1529.17"8.86"−1.4%59.2 mphCompare
30x9.50R1530.00"9.50"+1.4%60.8 mphCompare
225/85R1530.06"8.86"+1.6%61.0 mphCompare
255/75R1530.06"10.04"+1.6%61.0 mphCompare
275/65R1529.07"10.83"−1.7%59.0 mphCompare
255/70R1529.06"10.04"−1.8%58.9 mphCompare
275/70R1530.16"10.83"+1.9%61.2 mphCompare
235/75R1528.88"9.25"−2.4%58.6 mphCompare

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

SizeWheelDiameterDifference
275/35R2222"29.58"0.0%Compare
245/60R1818"29.57"0.0%Compare
305/40R2020"29.61"+0.1%Compare
245/55R1919"29.61"+0.1%Compare
285/25R2424"29.61"+0.1%Compare
265/65R1616"29.56"−0.1%Compare
295/50R1818"29.61"+0.1%Compare
335/40R1919"29.55"−0.1%Compare
225/60R1919"29.63"+0.1%Compare
215/80R1616"29.54"−0.1%Compare
245/65R1717"29.54"−0.2%Compare
245/50R2020"29.65"+0.2%Compare

One size up or down

Compare 285/65R15 with another size

With 265/70R15 tires, when your speedometer says 60 mph you are really going

60.0 mph

265/70R15 is +0.02 inches (+0.1%) in overall diameter. That is within the 3% most shops and makers allow.

285/65R15265/70R15Difference%
Overall diameter29.59"29.61"+0.02"+0.1%
Section width11.22"10.43"−0.79"−7.0%
Sidewall height7.29"7.30"+0.01"+0.1%
Circumference92.95"93.01"+0.06"+0.1%
Revolutions per mile681.7681.2−0.5−0.1%

Questions

How tall is a 285/65R15 tire?
A 285/65R15 tire is 29.6 inches tall (752 mm), calculated from the size. It is 11.2 inches wide with 7.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 285/65R15 mean?
285/65R15 means a tire 285 mm wide, with sidewalls 65% as tall as the tire is wide (185 mm), radial construction (R), for a 15 inch wheel.
How many revolutions per mile does a 285/65R15 tire make?
About 682 revolutions per mile, based on a circumference of 92.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 285/65R15 tire?
Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 265/70R15 instead of 285/65R15?
265/70R15 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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