305/65R19 tire size in inches

A 305/65R19 tire measures

34.6" tall × 12.0" wide

7.81" sidewall on a 19" wheel. 583 revolutions per mile.

305/65R19 means a tire 305 mm wide, with sidewalls 65% as tall as the tire is wide (198 mm), radial construction (R), for a 19 inch wheel.

34.6"19" rim7.8"12.0" wide
305/65R19: 34.6 inches tall, 12.0 inches wide, on a 19 inch rim, drawn to scale

305/65R19 specs

Overall diameter (height)34.61 inches (879 mm)
Section width12.01 inches (305 mm)
Sidewall height7.81 inches (198 mm)
Wheel (rim) diameter19 inches
Circumference108.7 inches (2,762 mm)
Revolutions per mile583
Revolutions per kilometer362
Approximate rim width8.0" to 9.5"
In inches (flotation style)34.6x12.0R19
Aspect ratio65%

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 305/65R19 on a 19" wheel

These 19" sizes are within 3% of 305/65R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
335/60R1934.83"13.19"+0.6%60.4 mphCompare
355/55R1934.37"13.98"−0.7%59.6 mphCompare
325/60R1934.35"12.80"−0.7%59.6 mphCompare
315/65R1935.12"12.40"+1.5%60.9 mphCompare
295/65R1934.10"11.61"−1.5%59.1 mphCompare
345/55R1933.94"13.58"−1.9%58.8 mphCompare
345/60R1935.30"13.58"+2.0%61.2 mphCompare
315/60R1933.88"12.40"−2.1%58.7 mphCompare
325/65R1935.63"12.80"+3.0%61.8 mphCompare
285/65R1933.59"11.22"−3.0%58.2 mphCompare

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

SizeWheelDiameterDifference
325/65R1818"34.63"+0.1%Compare
285/65R2020"34.59"−0.1%Compare
295/80R1616"34.58"−0.1%Compare
345/50R2121"34.58"−0.1%Compare
315/55R2121"34.64"+0.1%Compare
355/45R2222"34.58"−0.1%Compare
335/40R2424"34.55"−0.2%Compare
335/55R2020"34.51"−0.3%Compare
295/55R2222"34.78"+0.5%Compare
325/50R2222"34.80"+0.5%Compare
295/75R1717"34.42"−0.5%Compare
305/70R1818"34.81"+0.6%Compare

One size up or down

Compare 305/65R19 with another size

With 315/65R19 tires, when your speedometer says 60 mph you are really going

60.9 mph

315/65R19 is +0.51 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

305/65R19315/65R19Difference%
Overall diameter34.61"35.12"+0.51"+1.5%
Section width12.01"12.40"+0.39"+3.3%
Sidewall height7.81"8.06"+0.26"+3.3%
Circumference108.73"110.34"+1.61"+1.5%
Revolutions per mile582.7574.2−8.5−1.5%

Questions

How tall is a 305/65R19 tire?
A 305/65R19 tire is 34.6 inches tall (879 mm), calculated from the size. It is 12.0 inches wide with 7.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 305/65R19 mean?
305/65R19 means a tire 305 mm wide, with sidewalls 65% as tall as the tire is wide (198 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 305/65R19 tire make?
About 583 revolutions per mile, based on a circumference of 108.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 305/65R19 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 335/60R19 instead of 305/65R19?
335/60R19 is +0.22 inches (+0.6%) in overall diameter, so at an indicated 60 mph you would be doing 60.4 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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