33x12.50R15 tire size in inches

A 33x12.50R15 tire measures

33.0" tall × 12.5" wide

9.00" sidewall on a 15" wheel. 611 revolutions per mile.

33x12.50R15 is a flotation (inch) size: 33 inches tall, 12.50 inches wide, for a 15 inch wheel. The R means radial construction.

33.0"15" rim9.0"12.5" wide
33x12.50R15: 33.0 inches tall, 12.5 inches wide, on a 15 inch rim, drawn to scale

33x12.50R15 specs

Overall diameter (height)33.00 inches (838 mm)
Section width12.50 inches (318 mm)
Sidewall height9.00 inches (229 mm)
Wheel (rim) diameter15 inches
Circumference103.7 inches (2,633 mm)
Revolutions per mile611
Revolutions per kilometer380
Approximate rim width8.5" to 11.0"
Aspect ratio (equivalent)72%

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 33x12.50R15 on a 15" wheel

These 15" sizes are within 3% of 33x12.50R15's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
285/80R1532.95"11.22"−0.1%59.9 mphCompare
265/85R1532.74"10.43"−0.8%59.5 mphCompare
275/85R1533.41"10.83"+1.2%60.7 mphCompare
275/80R1532.32"10.83"−2.1%58.8 mphCompare
255/85R1532.07"10.04"−2.8%58.3 mphCompare

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

SizeWheelDiameterDifference
33x12.50R1616"33.00"0.0%Compare
33x12.50R1717"33.00"0.0%Compare
33x12.50R1818"33.00"0.0%Compare
33x12.50R2020"33.00"0.0%Compare
33x12.50R2222"33.00"0.0%Compare
275/60R2020"32.99"0.0%Compare
305/50R2121"33.01"0.0%Compare
285/40R2424"32.98"−0.1%Compare
355/50R1919"32.98"−0.1%Compare
325/35R2424"32.96"−0.1%Compare
255/55R2222"33.04"+0.1%Compare
255/65R2020"33.05"+0.2%Compare

Compare 33x12.50R15 with another size

With 285/80R15 tires, when your speedometer says 60 mph you are really going

59.9 mph

285/80R15 is −0.05 inches (−0.1%) in overall diameter. That is within the 3% most shops and makers allow.

33x12.50R15285/80R15Difference%
Overall diameter33.00"32.95"−0.05"−0.1%
Section width12.50"11.22"−1.28"−10.2%
Sidewall height9.00"8.98"−0.02"−0.3%
Circumference103.67"103.52"−0.15"−0.1%
Revolutions per mile611.2612.0+0.9+0.1%

Questions

How tall is a 33x12.50R15 tire?
A 33x12.50R15 tire is 33.0 inches tall (838 mm), calculated from the size. It is 12.5 inches wide with 9.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 33x12.50R15 mean?
33x12.50R15 is a flotation (inch) size: 33 inches tall, 12.50 inches wide, for a 15 inch wheel. The R means radial construction.
How many revolutions per mile does a 33x12.50R15 tire make?
About 611 revolutions per mile, based on a circumference of 103.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 33x12.50R15 tire?
Roughly 8.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 285/80R15 instead of 33x12.50R15?
285/80R15 is −0.05 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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