245/70R14 tire size in inches

A 245/70R14 tire measures

27.5" tall × 9.6" wide

6.75" sidewall on a 14" wheel. 733 revolutions per mile.

245/70R14 means a tire 245 mm wide, with sidewalls 70% as tall as the tire is wide (172 mm), radial construction (R), for a 14 inch wheel.

27.5"14" rim6.8"9.6" wide
245/70R14: 27.5 inches tall, 9.6 inches wide, on a 14 inch rim, drawn to scale

245/70R14 specs

Overall diameter (height)27.50 inches (699 mm)
Section width9.65 inches (245 mm)
Sidewall height6.75 inches (172 mm)
Wheel (rim) diameter14 inches
Circumference86.4 inches (2,195 mm)
Revolutions per mile733
Revolutions per kilometer456
Approximate rim width6.5" to 8.0"
In inches (flotation style)27.5x9.6R14
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 245/70R14 on a 14" wheel

These 14" sizes are within 3% of 245/70R14's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
215/80R1427.54"8.46"+0.1%60.1 mphCompare
265/65R1427.56"10.43"+0.2%60.1 mphCompare
205/85R1427.72"8.07"+0.8%60.5 mphCompare
225/75R1427.29"8.86"−0.8%59.5 mphCompare
235/75R1427.88"9.25"+1.4%60.8 mphCompare
195/85R1427.05"7.68"−1.6%59.0 mphCompare
255/65R1427.05"10.04"−1.6%59.0 mphCompare
235/70R1426.95"9.25"−2.0%58.8 mphCompare
255/70R1428.06"10.04"+2.0%61.2 mphCompare
205/80R1426.91"8.07"−2.1%58.7 mphCompare
225/80R1428.17"8.86"+2.4%61.5 mphCompare
215/75R1426.70"8.46"−2.9%58.2 mphCompare

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

SizeWheelDiameterDifference
275/30R2121"27.50"0.0%Compare
205/65R1717"27.49"0.0%Compare
195/75R1616"27.52"0.0%Compare
225/65R1616"27.52"0.0%Compare
265/60R1515"27.52"+0.1%Compare
235/35R2121"27.48"−0.1%Compare
265/55R1616"27.48"−0.1%Compare
245/75R1313"27.47"−0.1%Compare
245/65R1515"27.54"+0.1%Compare
215/50R1919"27.46"−0.1%Compare
235/30R2222"27.55"+0.2%Compare
295/45R1717"27.45"−0.2%Compare

One size up or down

Compare 245/70R14 with another size

With 255/70R14 tires, when your speedometer says 60 mph you are really going

61.2 mph

255/70R14 is +0.55 inches (+2.0%) in overall diameter. That is within the 3% most shops and makers allow.

245/70R14255/70R14Difference%
Overall diameter27.50"28.06"+0.55"+2.0%
Section width9.65"10.04"+0.39"+4.1%
Sidewall height6.75"7.03"+0.28"+4.1%
Circumference86.41"88.14"+1.73"+2.0%
Revolutions per mile733.3718.9−14.4−2.0%

Questions

How tall is a 245/70R14 tire?
A 245/70R14 tire is 27.5 inches tall (699 mm), calculated from the size. It is 9.6 inches wide with 6.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 245/70R14 mean?
245/70R14 means a tire 245 mm wide, with sidewalls 70% as tall as the tire is wide (172 mm), radial construction (R), for a 14 inch wheel.
How many revolutions per mile does a 245/70R14 tire make?
About 733 revolutions per mile, based on a circumference of 86.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 245/70R14 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 215/80R14 instead of 245/70R14?
215/80R14 is +0.04 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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