305/60R17 tire size in inches

A 305/60R17 tire measures

31.4" tall × 12.0" wide

7.20" sidewall on a 17" wheel. 642 revolutions per mile.

305/60R17 means a tire 305 mm wide, with sidewalls 60% as tall as the tire is wide (183 mm), radial construction (R), for a 17 inch wheel.

31.4"17" rim7.2"12.0" wide
305/60R17: 31.4 inches tall, 12.0 inches wide, on a 17 inch rim, drawn to scale

305/60R17 specs

Overall diameter (height)31.41 inches (798 mm)
Section width12.01 inches (305 mm)
Sidewall height7.20 inches (183 mm)
Wheel (rim) diameter17 inches
Circumference98.7 inches (2,506 mm)
Revolutions per mile642
Revolutions per kilometer399
Approximate rim width8.0" to 9.5"
In inches (flotation style)31.4x12.0R17
Aspect ratio60%

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 305/60R17 on a 17" wheel

These 17" sizes are within 3% of 305/60R17's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
245/75R1731.47"9.65"+0.2%60.1 mphCompare
285/65R1731.59"11.22"+0.6%60.3 mphCompare
265/70R1731.61"10.43"+0.6%60.4 mphCompare
275/65R1731.07"10.83"−1.1%59.4 mphCompare
255/70R1731.06"10.04"−1.1%59.3 mphCompare
295/60R1730.94"11.61"−1.5%59.1 mphCompare
315/60R1731.88"12.40"+1.5%60.9 mphCompare
235/75R1730.88"9.25"−1.7%59.0 mphCompare
255/75R1732.06"10.04"+2.1%61.2 mphCompare
295/65R1732.10"11.61"+2.2%61.3 mphCompare
275/70R1732.16"10.83"+2.4%61.4 mphCompare
315/55R1730.64"12.40"−2.4%58.5 mphCompare

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

SizeWheelDiameterDifference
315/50R1919"31.40"0.0%Compare
245/85R1515"31.40"0.0%Compare
265/45R2222"31.39"−0.1%Compare
245/80R1616"31.43"+0.1%Compare
265/50R2121"31.43"+0.1%Compare
315/30R2424"31.44"+0.1%Compare
295/45R2121"31.45"+0.1%Compare
285/60R1818"31.46"+0.2%Compare
265/55R2020"31.48"+0.2%Compare
285/55R1919"31.34"−0.2%Compare
245/70R1818"31.50"+0.3%Compare
345/35R2222"31.51"+0.3%Compare

One size up or down

Compare 305/60R17 with another size

With 315/60R17 tires, when your speedometer says 60 mph you are really going

60.9 mph

315/60R17 is +0.47 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

305/60R17315/60R17Difference%
Overall diameter31.41"31.88"+0.47"+1.5%
Section width12.01"12.40"+0.39"+3.3%
Sidewall height7.20"7.44"+0.24"+3.3%
Circumference98.68"100.16"+1.48"+1.5%
Revolutions per mile642.1632.6−9.5−1.5%

Questions

How tall is a 305/60R17 tire?
A 305/60R17 tire is 31.4 inches tall (798 mm), calculated from the size. It is 12.0 inches wide with 7.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 305/60R17 mean?
305/60R17 means a tire 305 mm wide, with sidewalls 60% as tall as the tire is wide (183 mm), radial construction (R), for a 17 inch wheel.
How many revolutions per mile does a 305/60R17 tire make?
About 642 revolutions per mile, based on a circumference of 98.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 305/60R17 tire?
Roughly 8.0" to 9.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 245/75R17 instead of 305/60R17?
245/75R17 is +0.06 inches (+0.2%) 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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