235/70R13 tire size in inches

A 235/70R13 tire measures

26.0" tall × 9.3" wide

6.48" sidewall on a 13" wheel. 777 revolutions per mile.

235/70R13 means a tire 235 mm wide, with sidewalls 70% as tall as the tire is wide (165 mm), radial construction (R), for a 13 inch wheel.

26.0"13" rim6.5"9.3" wide
235/70R13: 26.0 inches tall, 9.3 inches wide, on a 13 inch rim, drawn to scale

235/70R13 specs

Overall diameter (height)25.95 inches (659 mm)
Section width9.25 inches (235 mm)
Sidewall height6.48 inches (165 mm)
Wheel (rim) diameter13 inches
Circumference81.5 inches (2,071 mm)
Revolutions per mile777
Revolutions per kilometer483
Approximate rim width6.0" to 7.5"
In inches (flotation style)26.0x9.3R13
Aspect ratio70%

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 235/70R13 on a 13" wheel

These 13" sizes are within 3% of 235/70R13's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
205/80R1325.91"8.07"−0.2%59.9 mphCompare
195/85R1326.05"7.68"+0.4%60.2 mphCompare
215/75R1325.70"8.46"−1.0%59.4 mphCompare
225/75R1326.29"8.86"+1.3%60.8 mphCompare
245/65R1325.54"9.65"−1.6%59.0 mphCompare
225/70R1325.40"8.86"−2.1%58.7 mphCompare
245/70R1326.50"9.65"+2.1%61.3 mphCompare
185/85R1325.38"7.28"−2.2%58.7 mphCompare
215/80R1326.54"8.46"+2.3%61.4 mphCompare
195/80R1325.28"7.68"−2.6%58.5 mphCompare
205/85R1326.72"8.07"+3.0%61.8 mphCompare

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

SizeWheelDiameterDifference
295/30R1919"25.97"+0.1%Compare
225/45R1818"25.97"+0.1%Compare
285/40R1717"25.98"+0.1%Compare
185/75R1515"25.93"−0.1%Compare
195/65R1616"25.98"+0.1%Compare
215/35R2020"25.93"−0.1%Compare
355/25R1919"25.99"+0.1%Compare
215/65R1515"26.00"+0.2%Compare
305/25R2020"26.00"+0.2%Compare
255/25R2121"26.02"+0.3%Compare
175/80R1515"26.02"+0.3%Compare
255/30R2020"26.02"+0.3%Compare

One size up or down

Compare 235/70R13 with another size

With 245/70R13 tires, when your speedometer says 60 mph you are really going

61.3 mph

245/70R13 is +0.55 inches (+2.1%) in overall diameter. That is within the 3% most shops and makers allow.

235/70R13245/70R13Difference%
Overall diameter25.95"26.50"+0.55"+2.1%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height6.48"6.75"+0.28"+4.3%
Circumference81.53"83.26"+1.73"+2.1%
Revolutions per mile777.1760.9−16.2−2.1%

Questions

How tall is a 235/70R13 tire?
A 235/70R13 tire is 26.0 inches tall (659 mm), calculated from the size. It is 9.3 inches wide with 6.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/70R13 mean?
235/70R13 means a tire 235 mm wide, with sidewalls 70% as tall as the tire is wide (165 mm), radial construction (R), for a 13 inch wheel.
How many revolutions per mile does a 235/70R13 tire make?
About 777 revolutions per mile, based on a circumference of 81.5 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/70R13 tire?
Roughly 6.0" to 7.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 205/80R13 instead of 235/70R13?
205/80R13 is −0.04 inches (−0.2%) 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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