245/75R13 tire size in inches

A 245/75R13 tire measures

27.5" tall × 9.6" wide

7.23" sidewall on a 13" wheel. 734 revolutions per mile.

245/75R13 means a tire 245 mm wide, with sidewalls 75% as tall as the tire is wide (184 mm), radial construction (R), for a 13 inch wheel.

27.5"13" rim7.2"9.6" wide
245/75R13: 27.5 inches tall, 9.6 inches wide, on a 13 inch rim, drawn to scale

245/75R13 specs

Overall diameter (height)27.47 inches (698 mm)
Section width9.65 inches (245 mm)
Sidewall height7.23 inches (184 mm)
Wheel (rim) diameter13 inches
Circumference86.3 inches (2,192 mm)
Revolutions per mile734
Revolutions per kilometer456
Approximate rim width6.5" to 8.0"
In inches (flotation style)27.5x9.6R13
Aspect ratio75%

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 245/75R13 on a 13" wheel

These 13" sizes are within 3% of 245/75R13's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
215/85R1327.39"8.46"−0.3%59.8 mphCompare
225/80R1327.17"8.86"−1.1%59.4 mphCompare
235/80R1327.80"9.25"+1.2%60.7 mphCompare
225/85R1328.06"8.86"+2.1%61.3 mphCompare
235/75R1326.88"9.25"−2.1%58.7 mphCompare
205/85R1326.72"8.07"−2.7%58.4 mphCompare

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

SizeWheelDiameterDifference
215/50R1919"27.46"0.0%Compare
235/35R2121"27.48"0.0%Compare
265/55R1616"27.48"0.0%Compare
295/45R1717"27.45"−0.1%Compare
205/65R1717"27.49"+0.1%Compare
275/30R2121"27.50"+0.1%Compare
315/30R2020"27.44"−0.1%Compare
245/70R1414"27.50"+0.1%Compare
265/50R1717"27.43"−0.1%Compare
195/75R1616"27.52"+0.2%Compare
225/65R1616"27.52"+0.2%Compare
265/60R1515"27.52"+0.2%Compare

One size up or down

Compare 245/75R13 with another size

With 215/85R13 tires, when your speedometer says 60 mph you are really going

59.8 mph

215/85R13 is −0.08 inches (−0.3%) in overall diameter. That is within the 3% most shops and makers allow.

245/75R13215/85R13Difference%
Overall diameter27.47"27.39"−0.08"−0.3%
Section width9.65"8.46"−1.18"−12.2%
Sidewall height7.23"7.19"−0.04"−0.5%
Circumference86.29"86.05"−0.25"−0.3%
Revolutions per mile734.2736.3+2.1+0.3%

Questions

How tall is a 245/75R13 tire?
A 245/75R13 tire is 27.5 inches tall (698 mm), calculated from the size. It is 9.6 inches wide with 7.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 245/75R13 mean?
245/75R13 means a tire 245 mm wide, with sidewalls 75% as tall as the tire is wide (184 mm), radial construction (R), for a 13 inch wheel.
How many revolutions per mile does a 245/75R13 tire make?
About 734 revolutions per mile, based on a circumference of 86.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 245/75R13 tire?
Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 215/85R13 instead of 245/75R13?
215/85R13 is −0.08 inches (−0.3%) in overall diameter, so at an indicated 60 mph you would be doing 59.8 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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