165/85R14 tire size in inches

A 165/85R14 tire measures

25.0" tall × 6.5" wide

5.52" sidewall on a 14" wheel. 805 revolutions per mile.

165/85R14 means a tire 165 mm wide, with sidewalls 85% as tall as the tire is wide (140 mm), radial construction (R), for a 14 inch wheel.

25.0"14" rim5.5"6.5" wide
165/85R14: 25.0 inches tall, 6.5 inches wide, on a 14 inch rim, drawn to scale

165/85R14 specs

Overall diameter (height)25.04 inches (636 mm)
Section width6.50 inches (165 mm)
Sidewall height5.52 inches (140 mm)
Wheel (rim) diameter14 inches
Circumference78.7 inches (1,998 mm)
Revolutions per mile805
Revolutions per kilometer500
Approximate rim width4.5" to 6.0"
In inches (flotation style)25.0x6.5R14
Aspect ratio85%

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 165/85R14 on a 14" wheel

These 14" sizes are within 3% of 165/85R14's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
255/55R1425.04"10.04"0.0%60.0 mphCompare
175/80R1425.02"6.89"−0.1%60.0 mphCompare
215/65R1425.00"8.46"−0.2%59.9 mphCompare
235/60R1425.10"9.25"+0.2%60.1 mphCompare
185/75R1424.93"7.28"−0.5%59.7 mphCompare
205/70R1425.30"8.07"+1.0%60.6 mphCompare
195/70R1424.75"7.68"−1.2%59.3 mphCompare
225/60R1424.63"8.86"−1.7%59.0 mphCompare
265/55R1425.48"10.43"+1.7%61.0 mphCompare
245/55R1424.61"9.65"−1.7%59.0 mphCompare
195/75R1425.52"7.68"+1.9%61.1 mphCompare
225/65R1425.52"8.86"+1.9%61.1 mphCompare

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

SizeWheelDiameterDifference
255/50R1515"25.04"0.0%Compare
255/45R1616"25.04"0.0%Compare
255/40R1717"25.03"0.0%Compare
235/65R1313"25.03"−0.1%Compare
255/35R1818"25.03"−0.1%Compare
255/30R1919"25.02"−0.1%Compare
255/25R2020"25.02"−0.1%Compare
205/50R1717"25.07"+0.1%Compare
185/55R1717"25.01"−0.1%Compare
215/30R2020"25.08"+0.1%Compare
305/25R1919"25.00"−0.2%Compare
225/40R1818"25.09"+0.2%Compare

One size up or down

Compare 165/85R14 with another size

With 175/85R14 tires, when your speedometer says 60 mph you are really going

61.6 mph

175/85R14 is +0.67 inches (+2.7%) in overall diameter. That is within the 3% most shops and makers allow.

165/85R14175/85R14Difference%
Overall diameter25.04"25.71"+0.67"+2.7%
Section width6.50"6.89"+0.39"+6.1%
Sidewall height5.52"5.86"+0.33"+6.1%
Circumference78.68"80.78"+2.10"+2.7%
Revolutions per mile805.3784.4−21.0−2.6%

Questions

How tall is a 165/85R14 tire?
A 165/85R14 tire is 25.0 inches tall (636 mm), calculated from the size. It is 6.5 inches wide with 5.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 165/85R14 mean?
165/85R14 means a tire 165 mm wide, with sidewalls 85% as tall as the tire is wide (140 mm), radial construction (R), for a 14 inch wheel.
How many revolutions per mile does a 165/85R14 tire make?
About 805 revolutions per mile, based on a circumference of 78.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 165/85R14 tire?
Roughly 4.5" to 6.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 255/55R14 instead of 165/85R14?
255/55R14 is 0.00 inches (0.0%) 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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