305/35R19 tire size in inches

A 305/35R19 tire measures

27.4" tall × 12.0" wide

4.20" sidewall on a 19" wheel. 736 revolutions per mile.

305/35R19 means a tire 305 mm wide, with sidewalls 35% as tall as the tire is wide (107 mm), radial construction (R), for a 19 inch wheel.

27.4"19" rim4.2"12.0" wide
305/35R19: 27.4 inches tall, 12.0 inches wide, on a 19 inch rim, drawn to scale

305/35R19 specs

Overall diameter (height)27.41 inches (696 mm)
Section width12.01 inches (305 mm)
Sidewall height4.20 inches (107 mm)
Wheel (rim) diameter19 inches
Circumference86.1 inches (2,187 mm)
Revolutions per mile736
Revolutions per kilometer457
Approximate rim width10.0" to 11.5"
In inches (flotation style)27.4x12.0R19
Aspect ratio35%

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 305/35R19 on a 19" wheel

These 19" sizes are within 3% of 305/35R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
355/30R1927.39"13.98"−0.1%60.0 mphCompare
215/50R1927.46"8.46"+0.2%60.1 mphCompare
265/40R1927.35"10.43"−0.2%59.9 mphCompare
235/45R1927.33"9.25"−0.3%59.8 mphCompare
275/40R1927.66"10.83"+0.9%60.6 mphCompare
345/30R1927.15"13.58"−0.9%59.4 mphCompare
245/45R1927.68"9.65"+1.0%60.6 mphCompare
295/35R1927.13"11.61"−1.0%59.4 mphCompare
315/35R1927.68"12.40"+1.0%60.6 mphCompare
205/50R1927.07"8.07"−1.2%59.3 mphCompare
255/40R1927.03"10.04"−1.4%59.2 mphCompare
225/45R1926.97"8.86"−1.6%59.1 mphCompare

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

SizeWheelDiameterDifference
225/70R1515"27.40"0.0%Compare
235/40R2020"27.40"0.0%Compare
275/25R2222"27.41"0.0%Compare
325/25R2121"27.40"0.0%Compare
215/85R1313"27.39"−0.1%Compare
265/45R1818"27.39"−0.1%Compare
185/85R1515"27.38"−0.1%Compare
265/50R1717"27.43"+0.1%Compare
315/30R2020"27.44"+0.1%Compare
295/45R1717"27.45"+0.2%Compare
245/75R1313"27.47"+0.2%Compare
285/55R1515"27.34"−0.2%Compare

One size up or down

Compare 305/35R19 with another size

With 315/35R19 tires, when your speedometer says 60 mph you are really going

60.6 mph

315/35R19 is +0.28 inches (+1.0%) in overall diameter. That is within the 3% most shops and makers allow.

305/35R19315/35R19Difference%
Overall diameter27.41"27.68"+0.28"+1.0%
Section width12.01"12.40"+0.39"+3.3%
Sidewall height4.20"4.34"+0.14"+3.3%
Circumference86.10"86.96"+0.87"+1.0%
Revolutions per mile735.9728.6−7.3−1.0%

Questions

How tall is a 305/35R19 tire?
A 305/35R19 tire is 27.4 inches tall (696 mm), calculated from the size. It is 12.0 inches wide with 4.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 305/35R19 mean?
305/35R19 means a tire 305 mm wide, with sidewalls 35% as tall as the tire is wide (107 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 305/35R19 tire make?
About 736 revolutions per mile, based on a circumference of 86.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 305/35R19 tire?
Roughly 10.0" to 11.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 355/30R19 instead of 305/35R19?
355/30R19 is −0.02 inches (−0.1%) 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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